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Stock-Based Compensation Narrative (Details) $ / shares in Units, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) | Nov. 28, 2017 shares | May 31, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares approved for increase in available for issuance (in shares) | shares |  |  |  | 48,915,944 |
Common stock available for grant (in shares) | shares | 5,560,610 |  |  |  |
Stock-based compensation expense | $ | $ 36,545 | $ 18,930 | $ 16,983 |  |
Unrecognized compensation cost related to nonvested awards | $ | $ 7,346 |  |  |  |
Recognition period, weighted average | 2 years 2 months 26 days |  |  |  |
Restricted Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award conversation ratio | 1.62 |  |  |  |
Award vesting period | 3 years |  |  |  |
Vested (in shares) | shares | 1,052,235 |  |  |  |
Fair value of RSUs granted during the year | $ | $ 10,844 | 13,768 | 14,328 |  |
Fair value of restricted stock units vested during the year | $ | $ 10,391 | 6,437 | 12,805 |  |
Restricted Stock Units | Accelerated Vesting |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vested (in shares) | shares | 473,126 |  |  |  |
Performance Share Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vested (in shares) | shares | 345,282 |  |  |  |
Fair value of RSUs granted during the year | $ | $ 6,741 | 8,570 | 9,789 |  |
Fair value of performance share units vested | $ | $ 4,668 | 7,547 | 17,646 |  |
Performance Share Units | Granted 2015 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period | 3 years |  |  |  |
Performance Share Units | Granted 2016-2018 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period | 5 years |  |  |  |
Performance Share Units | Tranche One | Granted 2016-2018 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 20.00% |  |  |  |
Performance Share Units | Tranche Two | Granted 2016-2018 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 20.00% |  |  |  |
Performance Share Units | Tranche Three | Granted 2016-2018 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 20.00% |  |  |  |
Performance Share Units | Tranche Four | Granted 2016-2018 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 20.00% |  |  |  |
Performance Share Units | Tranche Five | Granted 2016-2018 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting rights percentage | 20.00% |  |  |  |
Performance Share Units | Accelerated Vesting |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vested (in shares) | shares | 903,100 |  |  |  |
Restricted Stock Units and Performance Share Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Long-term equity-based compensation expense | $ | $ 19,654 |  |  |  |
Board Approved Share Increase |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares approved for increase in available for issuance (in shares) | shares |  |  |  |  | 10,550,000
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award conversation ratio | 1 |  |  |  |
Award vesting period | 3 years |  |  |  |
Fair value of options granted during the year | $ | $ 50 | $ 143 | 353 |  |
Options outstanding (in shares) | shares | 4,696,264 | 5,442,920 |  |  |
Intrinsic value of options exercised | $ | $ 175 | $ 2,077 | 1,067 |  |
Cash received from option exercises | $ | 546 | 1,714 | 1,002 |  |
Tax impact from option exercises | $ | $ 46 | $ 569 | $ 205 |  |
Weighted average exercise price (in usd per share) | $ / shares | $ 18.05 | $ 18.74 |  |  |
Weighted average remaining contractual term, outstanding | 4 years 5 months 26 days |  |  |  |
Performance Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Options outstanding (in shares) | shares | 927,268 |  |  |  |
Weighted average exercise price (in usd per share) | $ / shares | $ 39.00 |  |  |  |
Weighted average remaining contractual term, outstanding | 5 months 15 days |  |  |  |
Director | Restricted Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period | 1 year |  |  |  |
Director | Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period | 1 year |  |  |  |
Options outstanding (in shares) | shares | 471,849 |  |  |  |
Employee | Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Options outstanding (in shares) | shares | 4,224,415 |  |  |  |
Minimum | Southeastern Asset Management, Inc. |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Ownership percentage in equity method investment | 25.00% |  |  |  |

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