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Stock Based Compensation (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2019 | Feb. 26, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Fair value of stock option awards outstanding (in shares) |  |  | 3,260,000 | 3,225,000 |
Aggregate intrinsic value |  |  | $ 3,300 |  |
Aggregate intrinsic value exercisable |  |  | $ 1,800 |  |
Weighted average contractual term |  |  | 1 year 8 months 8 days |  |
Total intrinsic value of options exercised |  |  | $ 800 | $ 7,000 | $ 13,200
Tax related benefits realized from the exercise of stock options |  |  | 2,800 | 5,700 | 5,000
Unrecognized compensation expense related to unvested stock options |  |  | $ 5,500 |  |
Weighted average remaining requisite service period of unvested stock awards |  |  | 1 year 8 months 19 days |  |
Fair value of option shares vested |  |  | $ 9,700 | 11,800 | 2,100
Stock-based compensation expense |  |  | 18,505 | 17,200 | 16,654
Stock based long term liability |  |  | $ 100 | 1,100 | 400
Options granted (in shares) |  |  | 540,000 |  |
Aggregate intrinsic value for the restricted stock and restricted stock units outstanding |  |  | $ 37,700 |  |
Aggregate intrinsic value expected to be settled in cash |  |  | 12,300 |  |
Tax benefits recognized for stock based compensation |  |  | 5,600 | 4,800 | 6,800
Capitalized stock-based compensation |  |  | 5,000 | 4,400 | 4,100
Expensed stock-based compensation |  |  | $ 21,600 | 17,200 | 16,700
Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period of shares |  |  | 3 years |  |
Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period of shares |  |  | 4 years |  |
Class A |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum shares that may be issued pursuant to options or restricted stock grants (in shares) |  |  | 3,481,569 |  |
Restricted Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Weighted average remaining requisite service period of unvested stock awards |  |  | 1 year 9 months 18 days |  |
Unrecognized compensation expense related to unvested restricted stock and restricted stock units |  |  | $ 28,300 |  |
Unrecognized compensation expense related to unvested restricted stock expected to be settled in cash |  |  | 9,100 |  |
Fair value of restricted stock and restricted stock units vested |  |  | 13,600 | 13,000 | 9,900
Restricted stock or unit expenses |  |  | $ 20,200 | 15,300 | 12,900
Restricted Stock | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period of shares |  |  | 1 year |  |
Restricted Stock | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period of shares |  |  | 4 years |  |
Performance-Based Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period of shares |  | 3 years |  |  |
Performance-Based Stock Units | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage | 0.00% |  |  |  |
Performance-Based Stock Units | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage | 200.00% |  |  |  |
Stock options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum vesting period |  |  | 5 years |  |
Maximum vesting period 2 |  |  | 6 years |  |
Maximum vesting period 3 |  |  | 10 years |  |
Stock-based compensation expense |  |  | $ 6,400 | $ 6,300 | $ 7,100
Restricted Stock Service Based [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Restricted stock grants (in shares) |  |  | 240,000 |  |
Restricted stock grants (in shares) |  |  | 674,000 |  |
2003 Stock and Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Fair value of stock option awards outstanding (in shares) |  |  | 65,000 | 67,500 | 75,000
2012 Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum shares of common stock provided (in shares) |  |  | 8,700,000 |  |
2019 Incentive Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum shares of common stock provided (in shares) |  |  | 3,433,671 |  |

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