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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Performance-Base Restricted Stock Awards    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Granted 67,091 100,281
Grant date fair value of awards $ 0.7 $ 1.1
Senior Management | Performance-Base Restricted Stock Awards    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Share-based compensation terms The 2020 performance-based RSAs were awarded to certain members of senior management in connection with the achievement of specific key financial metrics and a relative total shareholder return multiple measured over a three-year period and also vest over a three-year period. The number of 2020 performance-based awards that will ultimately vest is contingent upon the achievement of these key financial metrics and the results of the relative total shareholder return multiple by the end of year three. The 2019 performance-based RSAs were awarded to certain members of senior management in connection with the achievement of specific key financial metrics measured over a two-year period and vest over a three-year period. The number of 2019 performance-based awards that will ultimately vest is contingent upon the achievement of these key financial metrics by the end of year two. The Company assesses the probability of achieving these metrics on a quarterly basis.  
Senior Management | 2020 Performance Based Awards [Member]    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Vesting period of grants 3 years  
Senior Management | 2019 performance-based Awards [Member]    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Vesting period of grants 3 years