XML 95 R75.htm IDEA: XBRL DOCUMENT v3.20.4
Shareholders' Equity (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]      
Treasury Shares 23,029,434 24,034,053  
Remaining authorized stock repurchase program, amount $ 262,000    
Authorized stock repurchase program, amount 300,000    
Stock repurchased during period $ 351    
Repurchased shares, amount   $ 69,255 $ 168,735
Preferred stock, authorized (in shares) 1,000,000    
Preferred stock, issued (in shares) 0    
Treasury Stock      
Class of Stock [Line Items]      
Repurchased shares, amount   $ 69,255 $ 168,735
Nonvoting Common Stock      
Class of Stock [Line Items]      
Common stock repurchased (in shares)   1,156,184 3,749,493