| Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
The following tables summarize stock options, SARs, and non-vested restricted stock activity for the years ended December 31, 2015, 2014, and 2013:
Table 9.1
| | | | | | | | | | | | | | | | | | | | | | | For the Year Ended December 31, | | 2015 | | 2014 | | 2013 | | Stock
Options
and
SARs | | Weighted-
Average
Exercise
Price | | Stock
Options
and
SARs | | Weighted-
Average
Exercise
Price | | Stock
Options
and
SARs | | Weighted-
Average
Exercise
Price | Outstanding, beginning of year | 718,143 |
| | $ | 25.12 |
| | 664,245 |
| | $ | 23.78 |
| | 788,748 |
| | $ | 20.89 |
| Granted | 119,110 |
| | 32.25 |
| | 87,600 |
| | 34.92 |
| | 94,017 |
| | 31.24 |
| Exercised | (86,680 | ) | | 21.32 |
| | (23,035 | ) | | 20.83 |
| | (208,877 | ) | | 16.24 |
| Canceled | (3,000 | ) | | 30.05 |
| | (10,667 | ) | | 31.16 |
| | (9,643 | ) | | 23.02 |
| Outstanding, end of year | 747,573 |
| | 26.68 |
| | 718,143 |
| | 25.12 |
| | 664,245 |
| | 23.78 |
| Exercisable at end of year | 543,698 |
| | 24.34 |
| | 548,180 |
| | 23.12 |
| | 483,216 |
| | 22.83 |
| | | | | | | | | | | | | | For the Year Ended December 31, | | 2015 | | 2014 | | 2013 | | Non-vested
Restricted
Stock | | Weighted-
Average
Grant Date
Fair Value | | Non-vested
Restricted
Stock | | Weighted-
Average
Grant Date
Fair Value | | Non-vested
Restricted
Stock | | Weighted-
Average
Grant Date
Fair Value | Outstanding, beginning of year | 103,772 |
| | $ | 31.24 |
| | 98,285 |
| | $ | 27.66 |
| | 91,311 |
| | $ | 18.75 |
| Granted | 76,616 |
| | 32.14 |
| | 57,590 |
| | 33.88 |
| | 73,985 |
| | 30.27 |
| Canceled | — |
| | — |
| | (8,360 | ) | | 21.72 |
| | (1,000 | ) | | 31.42 |
| Vested and issued | (47,737 | ) | | 30.25 |
| | (43,743 | ) | | 28.48 |
| | (66,011 | ) | | 18.21 |
| Outstanding, end of year | 132,651 |
| | 32.12 |
| | 103,772 |
| | 31.24 |
| | 98,285 |
| | 27.66 |
|
|
| Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
The following tables summarize information regarding stock options, SARs, and non-vested restricted stock outstanding as of December 31, 2015:
Table 9.2
| | | | | | | | | | | | | | | | | | | Outstanding | | Exercisable | | Vested or Expected to Vest | Range of
Exercise Prices | | Stock Options and SARs | | Weighted-
Average Remaining Contractual Life | | Stock Options and SARs | | Weighted-
Average Remaining Contractual Life | | Stock Options and SARs | | Weighted-
Average Remaining Contractual Life | $5.00 - $9.99 | | 18,666 |
| | 3.3 years | | 18,666 |
| | 3.3 years | | 18,666 |
| | 3.3 years | 10.00 - 14.99 | | 66,665 |
| | 4.4 years | | 66,665 |
| | 4.4 years | | 66,665 |
| | 4.4 years | 15.00 - 19.99 | | 62,000 |
| | 5.4 years | | 62,000 |
| | 5.4 years | | 62,000 |
| | 5.4 years | 20.00 - 24.99 | | 100,500 |
| | 5.1 years | | 100,500 |
| | 5.1 years | | 100,500 |
| | 5.1 years | 25.00 - 29.99 | | 191,009 |
| | 1.9 years | | 187,009 |
| | 1.7 years | | 190,809 |
| | 1.9 years | 30.00 - 34.99 | | 250,733 |
| | 7.8 years | | 90,864 |
| | 6.1 years | | 241,931 |
| | 7.8 years | 35.00 - 39.99 | | 58,000 |
| | 8.2 years | | 17,994 |
| | 8.3 years | | 56,280 |
| | 8.2 years | | | 747,573 |
| | | | 543,698 |
| | | | 736,851 |
| | | | | | | | | | | | | | | | | | Outstanding | | Expected to Vest | | |
| | | Weighted-
Average
Grant-Date
Fair Value | | Non-vested Restricted Stock | | Weighted-Average Remaining Contractual
Life | | Non-vested Restricted Stock | | Weighted-Average Remaining Contractual
Life | | |
| | | $25.00 - $29.99 | | 6,778 |
| | 2.1 years | | 6,439 |
| | 2.1 years | | | | | 30.00 - 34.99 | | 124,324 |
| | 1.2 years | | 117,990 |
| | 1.2 years | | | | | 35.00 - 39.99 | | 1,549 |
| | 1.2 years | | 1,487 |
| | 1.2 years | | | | | | | 132,651 |
| | | | 125,916 |
| | | | | | |
|