Stock-based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands |
12 Months Ended |
|
|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Jan. 31, 2015 |
Jan. 31, 2014 |
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Stock-based compensation |
$ 4,620
|
$ 3,610
|
$ 2,973
|
|
|
| Stock-based compensation, capitalized |
195
|
$ 307
|
$ 130
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
$ 4,821
|
|
|
|
|
| Weighted-average grant date fair value of SARs |
$ 3.40
|
$ 3.97
|
$ 3.31
|
|
|
| Intrinsic value of SARs |
$ 348
|
|
|
|
|
| Common stock, shares issued |
70,613,642
|
70,109,488
|
|
|
|
| Time-Based Stock Appreciation Rights [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Stock-based compensation |
$ 2,194
|
$ 1,659
|
$ 1,412
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
1,023
|
|
|
|
|
| Performance-Based Stock Appreciation Rights [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
$ 2
|
|
|
|
|
| Weighted-average grant date fair value of SARs |
$ 3.32
|
$ 0
|
$ 2.52
|
|
|
| Intrinsic value of SARs |
$ 69
|
|
|
|
|
| Stock-based compensation expense |
21
|
$ 47
|
$ 247
|
|
|
| Time-Based Restricted Stock Units [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
$ 1,891
|
|
|
|
|
| Weighted-average grant date fair value of SARs |
$ 6.63
|
$ 6.66
|
|
|
|
| Stock-based compensation expense |
$ 636
|
$ 592
|
357
|
|
|
| Performance-Based Restricted Stock Units [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
$ 1,905
|
|
|
|
|
| Weighted-average grant date fair value of SARs |
$ 6.66
|
$ 6.41
|
|
|
|
| Stock-based compensation expense |
$ 1,124
|
$ 914
|
633
|
|
|
| Performance-Based Restricted Stock Units [Member] | First Quarter Two Thousand And Sixteen [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
538
|
|
|
|
|
| Performance-Based Restricted Stock Units [Member] | First Quarter Two Thousand And Seventeen [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Unrecognized compensation costs for all share-based payment arrangements |
1,367
|
|
|
|
|
| Performance Units [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Stock-based compensation expense |
$ 643
|
$ 398
|
$ 324
|
|
|
| Maximum percentage of MPUs for senior executives |
15.00%
|
|
|
|
|
| Fair value period of MPUs |
3 years
|
|
|
|
|
| Market Performance Units [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Term of MPUs |
3 years
|
|
|
|
|
| Common stock, shares issued |
|
|
|
54,801
|
33,594
|
| 2006 LTIP [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Number of shares available for grant |
1,949,400
|
|
|
|
|
| 2006 LTIP [Member] | SAR's [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Stock option plan maximum term of period |
10 years
|
|
|
|
|
| Stock appreciation rights expiration period |
10 years
|
|
|
|
|
| 2006 LTIP [Member] | Maximum [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Number of shares available for grant |
9,714,827
|
|
|
|
|
| 2014 Stock Option Plan [Member] | Maximum [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Term of MPUs |
10 years
|
|
|
|
|
| 2014 Stock Option Plan [Member] | Minimum [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Term of MPUs |
4 years
|
|
|
|
|
| 2004 Stock Option Plan [Member] |
|
|
|
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
|
|
|
|
|
| Stock option expiration period |
10 years
|
|
|
|
|
| Stock options granted |
0
|
0
|
0
|
|
|
| Intrinsic value of stock options exercised |
$ 55
|
|
|
|
|
| Number of stock options exercised |
50,000
|
|
|
|
|
| Weighted average exercise price of stock options |
$ 4.88
|
|
|
|
|
| Stock options outstanding |
0
|
|
|
|
|
| Stock options available for exercise |
0
|
|
|
|
|