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Stockholders' Equity (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Class of Stock [Line Items]    
Common stock repurchased $ 1,002  
Class A Common Stock | 2019 Stock Repurchase Program    
Class of Stock [Line Items]    
Stock repurchase program, authorized amount   $ 25,000
Common stock repurchased (in shares) 32,286  
Common stock repurchased $ 1,000