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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding at beginning of period (in shares) 1,085,023 963,832
Granted (in shares) 274,606 437,054
Converted (in shares) (120,830) (200,563)
Expired (in shares) (1,200) (34,100)
Forfeited (in shares) 0 (1,000)
Outstanding at end of period (in shares) 1,237,599 1,165,223
Vested (in shares) 357,499 353,023
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Outstanding at beginning of period, Weighted average grant-date fair value (in dollars per share) $ 17.14 $ 17.67
Granted, Weighted average grant-date fair value (in dollars per share) 26.65 18.85
Converted, Weighted average grant-date fair value (in dollars per share) 25.40 19.87
Expired, Weighted average grant-date fair value (in dollars per share) 26.60 19.40
Forfeited, Weighted average grant-date fair value (in dollars per share) 0 18.90
Outstanding at end of period, Weighted average grant-date fair value (in dollars per share) 18.44 17.69
Vested (in dollars per share) $ 9.26 $ 8.25
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]    
Share-based compensation expense $ 3.5 $ 4.0
Unrecognized share-based compensation expense $ 10.6  
Unrecognized share-based compensation, weighted average recognition period 1 year 6 months  
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Requisite service period 3 years  
Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Requisite service period 3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]    
Historical volatility period 3 years  
Risk-free interest rate 0.30%  
Expected volatility rate 39.70%  
Market Condition Award [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Granted, Weighted average grant-date fair value (in dollars per share) $ 26.50  
Performance Condition Award [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Granted, Weighted average grant-date fair value (in dollars per share) $ 26.69  
Time-Based Awards [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]    
Number of additional outstanding shares issued (in shares) 1,535,949  
Director [Member] | Time-Based Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Vested (in shares) 357,499  
Director [Member] | Time-Based Awards [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Requisite service period 12 months