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Stock Based Compensation Plan (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Additional Disclosures [Abstract]    
Compensation cost related to unvested equity awards $ 10.4  
Weighted-average period for recognition of cost 2 years  
Selling, General and Administrative Expense [Member]    
Additional Disclosures [Abstract]    
Stock-based compensation expense $ 4.7 $ 2.0
Service-Based Restricted Stock Awards [Member]    
Equity Award Activity [Roll Forward]    
Outstanding, beginning balance (in shares) 239,281  
Granted/Issued (in shares) 118,021  
Awards vested or rights exercised (in shares) [1] (130,323)  
Forfeited (in shares) (3,435)  
Outstanding, ending balance (in shares) 223,544  
Expected to vest (in shares) 223,544  
Weighted-Average Award Price [Roll Forward]    
Outstanding, beginning balance (in dollars per share) $ 20.77  
Granted/Issued (in dollars per share) 33.22  
Awards vested or rights exercised (in dollars per share) [1] 21.28  
Forfeited (in dollars per share) 27.24  
Outstanding, ending balance (in dollars per share) 26.94  
Expected to vest (in dollars per share) $ 26.94  
Additional Disclosures [Abstract]    
Fair value of vested shares $ 6.1  
Aggregate intrinsic value of outstanding awards $ 9.6  
Service-Based Restricted Stock Awards [Member] | Minimum [Member]    
Additional Disclosures [Abstract]    
Vesting period of awards 3 years  
Service-Based Restricted Stock Awards [Member] | Maximum [Member]    
Additional Disclosures [Abstract]    
Vesting period of awards 4 years  
Performance-Based Restricted Stock Awards [Member]    
Equity Award Activity [Roll Forward]    
Outstanding, beginning balance (in shares) 213,895  
Granted/Issued (in shares) 93,685  
Awards vested or rights exercised (in shares) [1] (56,578)  
Forfeited (in shares) 0  
Additional units earned due to performance (in shares) 77,265  
Outstanding, ending balance (in shares) 328,267  
Expected to vest (in shares) 387,512  
Weighted-Average Award Price [Roll Forward]    
Outstanding, beginning balance (in dollars per share) $ 21.08  
Granted/Issued (in dollars per share) 32.83  
Awards vested or rights exercised (in dollars per share) [1] 22.95  
Forfeited (in dollars per share) 0  
Additional units earned due to performance (in dollars per share) 20.42  
Outstanding, ending balance (in dollars per share) 23.96  
Expected to vest (in dollars per share) $ 25.36  
Additional Disclosures [Abstract]    
Fair value of vested shares $ 2.0  
Aggregate intrinsic value of outstanding awards $ 16.6  
Performance period 1 year  
Cliff vesting period 3 years  
[1] Includes shares repurchased from employees for employee’s tax liability.