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Stock-Based Compensation and Employee Benefits (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employer contribution $ 9,500,000 $ 9,600,000 $ 8,400,000
Eligible employee contribution, minimum (in percent) 1.00%    
Eligible employee contribution, maximum (in percent) 10.00%    
Number of shares authorized under the plan 2,550,000    
Number of shares available to be issued under the plan 1,772,070    
Compensation expense $ 11,733,000    
Compensation cost for all share-based arrangements, net of taxes 11,800,000 9,000,000.0 8,100,000
Employer discretionary contributions $ 1,000,000.0 $ 1,000,000 $ 260,000
RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 386,913 95,891 121,243
Compensation expense   $ 8,803,000 $ 7,790,000
Weighted average period over which unrecognized compensation expense is expected to be recognized (in years) 3 years 1 month 2 days 2 years 10 months 24 days 3 years 1 month 24 days
SARs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 6,000 $ 121,000 $ 265,000
Weighted average remaining contractual life of SARs (in years) 2 years 1 month 20 days 2 years 5 months 8 days 3 years 4 months 6 days
Weighted average period over which unrecognized compensation expense is expected to be recognized (in years) 0 years 2 months 1 day 9 months
Cash based performance      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of cash-based performance units issued in period   138,773 121,260
Number of cash-based performance units outstanding 163,856    
Cash-based compensation expense $ 5,800,000 $ 8,000,000.0 $ 13,900,000
Service based      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 4 years    
Minimum | RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 4 years 4 years 4 years
Maximum | RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 5 years 5 years 5 years
Director | RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     0
2006 ESPP      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized under the plan 400,000    
Number of shares purchased under the plan 155,933 143,348 132,285