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Stock Based Compensation Plan (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Additional Disclosures [Abstract]    
Total compensation cost related to unvested equity awards $ 5,744,000  
Weighted-average period of recognition of cost 2 years 3 months 18 days  
Selling, General and Administrative Expense [Member]    
Additional Disclosures [Abstract]    
Stock based compensation expense $ 972,000 $ 1,061,000
Service-Based Restricted Stock Awards [Member]    
Shares or Units and Rights [Roll Forward]    
Outstanding, beginning balance (in shares) 234,810  
Granted/Issued (in shares) 145,375  
Awards vested or rights exercised (in shares) [1] 0  
Forfeited (in shares) 0  
Outstanding, ending balance (in shares) 380,185  
Awards expected to vest (in shares) 0  
Weighted-Average Award Price [Roll Forward]    
Outstanding, beginning balance (in dollars per share) $ 20.93  
Granted/Issued (in dollars per share) 20.42  
Awards vested or rights exercised (in dollars per share) [1] 0  
Forfeited (in dollars per share) 0  
Outstanding, ending balance (in dollars per share) 20.73  
Awards expected to vest (in dollars per share) $ 0  
Additional Disclosures [Abstract]    
Aggregate intrinsic value of outstanding awards $ 4,500,000  
Service-Based Restricted Stock Awards [Member] | Maximum [Member]    
Additional Disclosures [Abstract]    
Vesting period of awards 4 years  
Service-Based Restricted Stock Awards [Member] | Minimum [Member]    
Additional Disclosures [Abstract]    
Vesting period of awards 3 years  
Performance-Based Restricted Stock Awards [Member]    
Shares or Units and Rights [Roll Forward]    
Outstanding, beginning balance (in shares) 214,809  
Granted/Issued (in shares) 120,727  
Awards vested or rights exercised (in shares) [1] (44,875)  
Forfeited (in shares) (76,493)  
Outstanding, ending balance (in shares) 214,168  
Awards expected to vest (in shares) 91,791  
Weighted-Average Award Price [Roll Forward]    
Outstanding, beginning balance (in dollars per share) $ 21.38  
Granted/Issued (in dollars per share) 20.42  
Awards vested or rights exercised (in dollars per share) [1] 22.12  
Forfeited (in dollars per share) 20.29  
Outstanding, ending balance (in dollars per share) 21.08  
Awards expected to vest (in dollars per share) $ 21.93  
Additional Disclosures [Abstract]    
Aggregate intrinsic value of outstanding awards $ 1,100,000  
Fair value of vested shares $ 800,000  
Performance period 1 year  
Vesting period of awards 3 years  
Stock-Settled Appreciation Rights [Member]    
Shares or Units and Rights [Roll Forward]    
Outstanding, beginning balance (in shares) 7,500  
Granted/Issued (in shares) 0  
Awards vested or rights exercised (in shares) [1] (7,500)  
Forfeited (in shares) 0  
Outstanding, ending balance (in shares) 0  
Awards expected to vest (in shares) 0  
Weighted-Average Award Price [Roll Forward]    
Outstanding, beginning balance (in dollars per share) $ 18.14  
Awards vested or rights exercised (in dollars per share) [1] 18.14  
Forfeited (in dollars per share) 0  
Outstanding, ending balance (in dollars per share) 0  
Awards expected to vest (in dollars per share) $ 0  
Additional Disclosures [Abstract]    
Intrinsic value of awards exercised $ 18,000  
[1] Includes shares repurchased from employees for employee's tax liability.