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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%