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Earnings per Share (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Aug. 30, 2018
Earnings per Share [Line Items]              
Total anti-dilutive shares excluded from the calculation (in shares) 39,000   95,000   490,000 71,000  
Number of shares repurchased 88,933   407,293   489,850 686,240  
Number of shares repurchased, cost $ 3,009 $ 12,355 $ 15,015 $ 10,158 $ 15,400 $ 25,200  
Stock repurchase program, remaining amount $ 59,500       $ 59,500    
Unsettled repurchase shares 0       0    
Maximum [Member]              
Earnings per Share [Line Items]              
Stock repurchase program, authorized amount             $ 100,000