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Stockholders' Equity (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
$ / shares
Jun. 30, 2019
USD ($)
shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2019
USD ($)
shares
Mar. 27, 2020
right
$ / shares
shares
Feb. 29, 2020
USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Increase (decrease) in authorization amount           $ 194,200,000
Authorized amount of stock to be repurchased           $ 300,000,000.0
Treasury stock, acquired (in shares) | shares   24,170 2,600,000 39,901    
Payments for repurchase of common stock   $ 1,500,000 $ 187,500,000 $ 2,300,000    
Value of treasury stock acquired   1,500,000 $ 187,500,000 2,300,000    
Number of rights authorized and declared per common share | right         1  
Preferred stock par or stated value (in dollars per share) | $ / shares $ 0.01   $ 0.01      
Number of securities per each right | shares         0.001  
Exercise price | $ / shares         $ 0.273  
Affiliated person common shares trigger percent         0.10  
Passive investor common shares trigger percent         0.20  
Performance-based Restricted Stock Units            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Value of treasury stock acquired $ 200,000 $ 300,000 $ 12,000,000.0 $ 3,200,000    
February 2016 Program            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Remaining shares under share repurchase authorization $ 131,300,000   $ 131,300,000