|
Stock Option Plan - Stock Options Issued (Detail) (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Total grant (in shares) |
1,315,000 |
|
|
| Vested (in shares) |
714,375 |
|
|
| Exercised (in shares) |
278,875 |
|
|
| Forfeited (in shares) |
282,500 |
|
|
| Exercisable at December 31 (in shares) |
413,000 |
377,715 |
512,085 |
| Remaining unexercised (in shares) |
753,625 |
|
|
| Exercise price (in usd per share) |
$ 33.15 |
$ 31.03 |
$ 29.03 |
| Total value at grant date |
$ 8,075,838 |
|
|
| Forfeited options |
1,119,125 |
|
|
| Expensed in previous years |
3,139,107 |
|
|
| Future expense |
1,745,084 |
|
|
|
Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
588,613 |
|
|
|
Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
619,503 |
|
|
|
Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
864,406 |
|
|
|
Subtotals
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Total grant (in shares) |
997,500 |
|
|
| Vested (in shares) |
396,875 |
|
|
| Exercised (in shares) |
191,375 |
|
|
| Forfeited (in shares) |
260,000 |
|
|
| Exercisable at December 31 (in shares) |
205,500 |
|
|
| Remaining unexercised (in shares) |
546,125 |
|
|
| Total value at grant date |
5,939,129 |
|
|
| Forfeited options |
1,119,125 |
|
|
| Expensed in previous years |
1,807,107 |
|
|
| Future expense |
1,745,084 |
|
|
|
Directors
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
124,400 |
110,000 |
109,000 |
|
Directors | 4/26/2004
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
Apr. 26,
2004 |
|
|
| Total grant (in shares) |
30,000 |
|
|
| Vested (in shares) |
30,000 |
|
|
| Exercised (in shares) |
25,000 |
|
|
| Forfeited (in shares) |
0 |
|
|
| Exercisable at December 31 (in shares) |
5,000 |
|
|
| Remaining unexercised (in shares) |
5,000 |
|
|
| Exercise price (in usd per share) |
$ 25.78 |
|
|
| Volatility |
0.183 |
|
|
| Expected life (years) |
5 years |
|
|
| Assumed yield |
5.75% |
|
|
| Risk-free rate |
3.57% |
|
|
| Total value at grant date |
66,600 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
66,600 |
|
|
| Future expense |
0 |
|
|
|
Directors | 4/26/2004 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/26/2004 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/26/2004 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/6/2005
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May
06,
2005 |
|
|
| Total grant (in shares) |
30,000 |
|
|
| Vested (in shares) |
30,000 |
|
|
| Exercised (in shares) |
22,500 |
|
|
| Forfeited (in shares) |
0 |
|
|
| Exercisable at December 31 (in shares) |
7,500 |
|
|
| Remaining unexercised (in shares) |
7,500 |
|
|
| Exercise price (in usd per share) |
$ 33.22 |
|
|
| Volatility |
0.198 |
|
|
| Expected life (years) |
10 years |
|
|
| Assumed yield |
6.91% |
|
|
| Risk-free rate |
4.28% |
|
|
| Total value at grant date |
71,100 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
71,100 |
|
|
| Future expense |
0 |
|
|
|
Directors | 5/6/2005 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/6/2005 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/6/2005 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/1/2006
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May
01,
2006 |
|
|
| Total grant (in shares) |
30,000 |
|
|
| Vested (in shares) |
30,000 |
|
|
| Exercised (in shares) |
5,000 |
|
|
| Forfeited (in shares) |
2,500 |
|
|
| Exercisable at December 31 (in shares) |
22,500 |
|
|
| Remaining unexercised (in shares) |
22,500 |
|
|
| Exercise price (in usd per share) |
$ 40.35 |
|
|
| Volatility |
0.206 |
|
|
| Expected life (years) |
9 years |
|
|
| Assumed yield |
5.93% |
|
|
| Risk-free rate |
5.11% |
|
|
| Total value at grant date |
143,400 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
143,400 |
|
|
| Future expense |
0 |
|
|
|
Directors | 5/1/2006 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/1/2006 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/1/2006 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/27/2007
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
Apr. 27,
2007 |
|
|
| Total grant (in shares) |
30,000 |
|
|
| Vested (in shares) |
30,000 |
|
|
| Exercised (in shares) |
0 |
|
|
| Forfeited (in shares) |
7,500 |
|
|
| Exercisable at December 31 (in shares) |
22,500 |
|
|
| Remaining unexercised (in shares) |
22,500 |
|
|
| Exercise price (in usd per share) |
$ 54.17 |
|
|
| Volatility |
0.225 |
|
|
| Expected life (years) |
8 years |
|
|
| Assumed yield |
4.39% |
|
|
| Risk-free rate |
4.65% |
|
|
| Total value at grant date |
285,300 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
285,300 |
|
|
| Future expense |
0 |
|
|
|
Directors | 4/27/2007 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/27/2007 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/27/2007 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/25/2008
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
Apr. 25,
2008 |
|
|
| Total grant (in shares) |
30,000 |
|
|
| Vested (in shares) |
30,000 |
|
|
| Exercised (in shares) |
0 |
|
|
| Forfeited (in shares) |
7,500 |
|
|
| Exercisable at December 31 (in shares) |
22,500 |
|
|
| Remaining unexercised (in shares) |
22,500 |
|
|
| Exercise price (in usd per share) |
$ 50.15 |
|
|
| Volatility |
0.237 |
|
|
| Expected life (years) |
7 years |
|
|
| Assumed yield |
4.09% |
|
|
| Risk-free rate |
3.49% |
|
|
| Total value at grant date |
254,700 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
254,700 |
|
|
| Future expense |
0 |
|
|
|
Directors | 4/25/2008 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/25/2008 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/25/2008 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/24/2009
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
Apr. 24,
2009 |
|
|
| Total grant (in shares) |
32,500 |
|
|
| Vested (in shares) |
32,500 |
|
|
| Exercised (in shares) |
17,500 |
|
|
| Forfeited (in shares) |
0 |
|
|
| Exercisable at December 31 (in shares) |
15,000 |
|
|
| Remaining unexercised (in shares) |
15,000 |
|
|
| Exercise price (in usd per share) |
$ 32.68 |
|
|
| Volatility |
0.344 |
|
|
| Expected life (years) |
6 years |
|
|
| Assumed yield |
4.54% |
|
|
| Risk-free rate |
2.19% |
|
|
| Total value at grant date |
222,950 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
222,950 |
|
|
| Future expense |
0 |
|
|
|
Directors | 4/24/2009 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/24/2009 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 4/24/2009 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/7/2010
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May
07,
2010 |
|
|
| Total grant (in shares) |
32,500 |
|
|
| Vested (in shares) |
32,500 |
|
|
| Exercised (in shares) |
5,000 |
|
|
| Forfeited (in shares) |
2,500 |
|
|
| Exercisable at December 31 (in shares) |
25,000 |
|
|
| Remaining unexercised (in shares) |
25,000 |
|
|
| Exercise price (in usd per share) |
$ 38.76 |
|
|
| Volatility |
0.369 |
|
|
| Expected life (years) |
5 years |
|
|
| Assumed yield |
4.23% |
|
|
| Risk-free rate |
2.17% |
|
|
| Total value at grant date |
287,950 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
287,950 |
|
|
| Future expense |
0 |
|
|
|
Directors | 5/7/2010 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/7/2010 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/7/2010 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/13/2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May 13,
2011 |
|
|
| Total grant (in shares) |
32,500 |
|
|
| Vested (in shares) |
32,500 |
|
|
| Exercised (in shares) |
5,000 |
|
|
| Forfeited (in shares) |
2,500 |
|
|
| Exercisable at December 31 (in shares) |
25,000 |
|
|
| Remaining unexercised (in shares) |
25,000 |
|
|
| Exercise price (in usd per share) |
$ 41.82 |
|
|
| Volatility |
0.358 |
|
|
| Expected life (years) |
5 years |
|
|
| Assumed yield |
4.16% |
|
|
| Risk-free rate |
1.86% |
|
|
| Total value at grant date |
297,375 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
0 |
|
|
| Future expense |
0 |
|
|
|
Directors | 5/13/2011 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
297,375 |
|
|
|
Directors | 5/13/2011 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/13/2011 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/4/2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May
04,
2012 |
|
|
| Total grant (in shares) |
35,000 |
|
|
| Vested (in shares) |
35,000 |
|
|
| Exercised (in shares) |
5,000 |
|
|
| Forfeited (in shares) |
0 |
|
|
| Exercisable at December 31 (in shares) |
30,000 |
|
|
| Remaining unexercised (in shares) |
30,000 |
|
|
| Exercise price (in usd per share) |
$ 39.29 |
|
|
| Volatility |
0.348 |
|
|
| Expected life (years) |
5 years |
|
|
| Assumed yield |
4.61% |
|
|
| Risk-free rate |
0.78% |
|
|
| Total value at grant date |
244,388 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
0 |
|
|
| Future expense |
0 |
|
|
|
Directors | 5/4/2012 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/4/2012 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
244,388 |
|
|
|
Directors | 5/4/2012 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/10/2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May 10,
2013 |
|
|
| Total grant (in shares) |
35,000 |
|
|
| Vested (in shares) |
35,000 |
|
|
| Exercised (in shares) |
2,500 |
|
|
| Forfeited (in shares) |
0 |
|
|
| Exercisable at December 31 (in shares) |
32,500 |
|
|
| Remaining unexercised (in shares) |
32,500 |
|
|
| Exercise price (in usd per share) |
$ 44.42 |
|
|
| Volatility |
0.333 |
|
|
| Expected life (years) |
5 years |
|
|
| Assumed yield |
4.53% |
|
|
| Risk-free rate |
0.82% |
|
|
| Total value at grant date |
262,946 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
0 |
|
|
| Future expense |
0 |
|
|
|
Directors | 5/10/2013 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/10/2013 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Directors | 5/10/2013 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
262,946 |
|
|
|
Directors | Subtotals
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Total grant (in shares) |
317,500 |
|
|
| Vested (in shares) |
317,500 |
|
|
| Exercised (in shares) |
87,500 |
|
|
| Forfeited (in shares) |
22,500 |
|
|
| Exercisable at December 31 (in shares) |
207,500 |
|
|
| Remaining unexercised (in shares) |
207,500 |
|
|
| Total value at grant date |
2,136,709 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
1,332,000 |
|
|
| Future expense |
0 |
|
|
|
Directors | Subtotals | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
297,375 |
|
|
|
Directors | Subtotals | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
244,388 |
|
|
|
Directors | Subtotals | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
262,946 |
|
|
|
Officers | 4/26/2004
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
Apr. 26,
2004 |
|
|
| Total grant (in shares) |
122,500 |
|
|
| Vested (in shares) |
115,000 |
|
|
| Exercised (in shares) |
103,750 |
|
|
| Forfeited (in shares) |
7,500 |
|
|
| Exercisable at December 31 (in shares) |
11,250 |
|
|
| Remaining unexercised (in shares) |
11,250 |
|
|
| Exercise price (in usd per share) |
$ 25.78 |
|
|
| Volatility |
0.183 |
|
|
| Expected life (years) |
7 years |
|
|
| Assumed yield |
5.75% |
|
|
| Risk-free rate |
4.05% |
|
|
| Total value at grant date |
292,775 |
|
|
| Forfeited options |
17,925 |
|
|
| Expensed in previous years |
274,850 |
|
|
| Future expense |
0 |
|
|
|
Officers | 4/26/2004 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 5/6/2005
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May
06,
2005 |
|
|
| Total grant (in shares) |
132,500 |
|
|
| Vested (in shares) |
118,750 |
|
|
| Exercised (in shares) |
69,500 |
|
|
| Forfeited (in shares) |
13,750 |
|
|
| Exercisable at December 31 (in shares) |
49,250 |
|
|
| Remaining unexercised (in shares) |
49,250 |
|
|
| Exercise price (in usd per share) |
$ 33.22 |
|
|
| Volatility |
0.207 |
|
|
| Expected life (years) |
8 years |
|
|
| Assumed yield |
6.37% |
|
|
| Risk-free rate |
4.15% |
|
|
| Total value at grant date |
413,400 |
|
|
| Forfeited options |
35,100 |
|
|
| Expensed in previous years |
378,300 |
|
|
| Future expense |
0 |
|
|
|
Officers | 5/6/2005 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 4/27/2007
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
Apr. 27,
2007 |
|
|
| Total grant (in shares) |
135,000 |
|
|
| Vested (in shares) |
67,500 |
|
|
| Exercised (in shares) |
0 |
|
|
| Forfeited (in shares) |
67,500 |
|
|
| Exercisable at December 31 (in shares) |
67,500 |
|
|
| Remaining unexercised (in shares) |
67,500 |
|
|
| Exercise price (in usd per share) |
$ 54.17 |
|
|
| Volatility |
0.233 |
|
|
| Expected life (years) |
6 years 6 months |
|
|
| Assumed yield |
4.13% |
|
|
| Risk-free rate |
4.61% |
|
|
| Total value at grant date |
1,258,848 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
1,153,957 |
|
|
| Future expense |
0 |
|
|
| Weighted average term of remaining future expense |
2 years 9 months 7 days |
|
|
|
Officers | 4/27/2007 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
104,891 |
|
|
|
Officers | 4/27/2007 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 4/27/2007 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 5/13/2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May 13,
2011 |
|
|
| Total grant (in shares) |
162,500 |
|
|
| Vested (in shares) |
67,500 |
|
|
| Exercised (in shares) |
16,250 |
|
|
| Forfeited (in shares) |
41,250 |
|
|
| Exercisable at December 31 (in shares) |
51,250 |
|
|
| Remaining unexercised (in shares) |
105,000 |
|
|
| Exercise price (in usd per share) |
$ 41.82 |
|
|
| Volatility |
0.330 |
|
|
| Expected life (years) |
8 years |
|
|
| Assumed yield |
4.81% |
|
|
| Risk-free rate |
2.75% |
|
|
| Total value at grant date |
1,277,794 |
|
|
| Forfeited options |
252,300 |
|
|
| Expensed in previous years |
0 |
|
|
| Future expense |
333,406 |
|
|
|
Officers | 5/13/2011 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
186,347 |
|
|
|
Officers | 5/13/2011 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
270,391 |
|
|
|
Officers | 5/13/2011 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
235,350 |
|
|
|
Officers | 5/4/2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May
04,
2012 |
|
|
| Total grant (in shares) |
242,500 |
|
|
| Vested (in shares) |
28,125 |
|
|
| Exercised (in shares) |
1,875 |
|
|
| Forfeited (in shares) |
130,000 |
|
|
| Exercisable at December 31 (in shares) |
26,250 |
|
|
| Remaining unexercised (in shares) |
110,625 |
|
|
| Exercise price (in usd per share) |
$ 39.29 |
|
|
| Volatility |
0.315 |
|
|
| Expected life (years) |
8 years |
|
|
| Assumed yield |
5.28% |
|
|
| Risk-free rate |
1.49% |
|
|
| Total value at grant date |
1,442,148 |
|
|
| Forfeited options |
813,800 |
|
|
| Expensed in previous years |
0 |
|
|
| Future expense |
366,541 |
|
|
|
Officers | 5/4/2012 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 5/4/2012 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
104,724 |
|
|
|
Officers | 5/4/2012 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
157,083 |
|
|
|
Officers | 5/10/2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Grant date |
May 10,
2013 |
|
|
| Total grant (in shares) |
202,500 |
|
|
| Vested (in shares) |
0 |
|
|
| Exercised (in shares) |
0 |
|
|
| Forfeited (in shares) |
0 |
|
|
| Exercisable at December 31 (in shares) |
0 |
|
|
| Remaining unexercised (in shares) |
202,500 |
|
|
| Exercise price (in usd per share) |
$ 44.42 |
|
|
| Volatility |
0.304 |
|
|
| Expected life (years) |
8 years |
|
|
| Assumed yield |
5.12% |
|
|
| Risk-free rate |
1.49% |
|
|
| Total value at grant date |
1,254,164 |
|
|
| Forfeited options |
0 |
|
|
| Expensed in previous years |
0 |
|
|
| Future expense |
1,045,137 |
|
|
|
Officers | 5/10/2013 | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 5/10/2013 | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
0 |
|
|
|
Officers | 5/10/2013 | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
209,027 |
|
|
|
Officers | Subtotals | Expensed in 2011
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
291,238 |
|
|
|
Officers | Subtotals | Expensed in 2012
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
375,115 |
|
|
|
Officers | Subtotals | Expensed in 2013
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Allocated share based compensation |
$ 601,460 |
|
|