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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2013
Stock-Based Compensation |
Schedule of the assumptions used in determining the fair value of stock options granted for fixed awards with graded vesting schedules |
|  | 2013 |  | 2012 |  | 2011
--- | --- | --- | --- | --- | --- | ---
Risk-free interest rate |  | 1.0% |  | 1.2% - 1.4% |  | 2.4%
Expected dividend yield |  | 0.0% |  | 0.0% |  | 0.0%
Weighted average expected volatility |  | 50% |  | 50% |  | 49%
Expected term |  | 6.0 years |  | 6.0 - 6.3 years |  | 6.0 years
Weighted average grant-date fair value |  | $11.74 |  | $8.57 |  | $11.88
Schedule of the activity relating to the options outstanding under the Company's plans |
|  | Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value (in thousands) |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Outstanding at January 1, 2011 |  |  | 1,766,253 |  | $ | 7.18 |  |  |  |  |  |
Granted |  |  | 90,080 |  | $ | 24.18 |  |  |  |  |  |
Exercised |  |  | (332,099 | ) | $ | 4.12 |  |  |  |  |  |
Forfeited |  |  | (8,850 | ) | $ | 14.89 |  |  |  |  |  |
Expired |  |  | (500 | ) | $ | 13.00 |  |  |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2011 |  |  | 1,514,884 |  | $ | 8.82 |  | 5.5 years |  | $ | 16,083 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Granted |  |  | 169,088 |  | $ | 17.76 |  |  |  |  |  |
Exercised |  |  | (245,054 | ) | $ | 5.78 |  |  |  |  |  |
Forfeited |  |  | (4,680 | ) | $ | 19.19 |  |  |  |  |  |
Expired |  |  | (2,010 | ) | $ | 18.85 |  |  |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2012 |  |  | 1,432,228 |  | $ | 10.34 |  | 5.1 years |  | $ | 17,220 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Granted |  |  | 111,147 |  | $ | 24.68 |  |  |  |  |  |
Exercised |  |  | (390,652 | ) | $ | 5.90 |  |  |  |  |  |
Forfeited |  |  | (4,003 | ) | $ | 20.28 |  |  |  |  |  |
Expired |  |  | (1,400 | ) | $ | 15.96 |  |  |  |  |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2013 |  |  | 1,147,320 |  | $ | 13.21 |  | 5.1 years |  | $ | 13,623 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable at December 31, 2013 |  |  | 899,406 |  | $ | 10.91 |  | 4.1 years |  | $ | 12,742 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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Schedule of other data relating to option activity |
(dollars in thousands) |  | 2013 |  | 2012 |  | 2011 |
--- | --- | --- | --- | --- | --- | --- | ---
Intrinsic value of options exercised |  | $ | 6,878 |  | $ | 3,421 |  | $ | 6,637 |
Fair value of options vested |  |  | 1,047 |  |  | 725 |  |  | 1,163 |
Schedule of information with respect to stock options outstanding and exercisable | The following table summarizes information with respect to stock options outstanding and exercisable under the Company's plans at December 31, 2013:
|  | Options Outstanding |  | Options Exercisable |
--- | --- | --- | --- | --- | ---
Exercise Price Ranges |  | Number Of Options |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term |  | Number Of Options |  | Weighted- Average Exercise Price |
$3.65 - $9.00 |  |  | 340,522 |  | $ | 3.72 |  | 2.5 years |  |  | 340,522 |  | $ | 3.72 |
$9.01 - $18.00 |  |  | 586,817 |  | $ | 14.69 |  | 5.3 years |  |  | 492,929 |  | $ | 14.16 |
$18.01 - $24.68 |  |  | 219,981 |  | $ | 23.92 |  | 8.3 years |  |  | 65,955 |  | $ | 23.76 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 1,147,320 |  | $ | 13.21 |  | 5.1 years |  |  | 899,406 |  | $ | 10.91 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of restricted stock activity |
|  | Shares |  | Per Share Weighted- Average Grant Date Fair Value |
--- | --- | --- | --- | --- | ---
Outstanding at January 1, 2011 |  |  | 53,945 |  | $ | 17.15 |
Granted |  |  | 65,285 |  | $ | 24.23 |
Vested |  |  | (11,128 | ) | $ | 17.13 |
Forfeited |  |  | (1,264 | ) | $ | 17.74 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding unvested at December 31, 2011 |  |  | 106,838 |  | $ | 21.47 |
Granted |  |  | 106,289 |  | $ | 17.95 |
Vested |  |  | (25,248 | ) | $ | 21.07 |
Forfeited |  |  | (2,115 | ) | $ | 18.91 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding unvested at December 31, 2012 |  |  | 185,764 |  | $ | 19.54 |
Granted |  |  | 76,590 |  | $ | 24.48 |
Vested |  |  | (48,513 | ) | $ | 19.50 |
Forfeited |  |  | (2,125 | ) | $ | 20.03 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding unvested at December 31, 2013 |  |  | 211,716 |  | $ | 21.33 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of performance stock award activity |
|  | Shares |  | Per Share Weighted- Average Grant Date Fair Value |
--- | --- | --- | --- | --- | ---
Outstanding at December 31, 2010 |  |  | 40,256 |  | $ | 17.18 |
Granted at target |  |  | 34,179 |  | $ | 24.18 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2011 |  |  | 74,435 |  | $ | 20.39 |
Granted at target |  |  | 41,755 |  | $ | 17.48 |
Forfeited for performance below target |  |  | (9,401 | ) | $ | 17.18 |
Vested |  |  | (30,855 | ) | $ | 17.18 |
Forfeited |  |  | (1,011 | ) | $ | 19.76 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2012 |  |  | 74,923 |  | $ | 20.51 |
Granted at target |  |  | 46,106 |  | $ | 24.68 |
Earned for performance above target |  |  | 11,281 |  | $ | 24.18 |
Vested |  |  | (45,116 | ) | $ | 24.18 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2013 |  |  | 87,194 |  | $ | 21.29 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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