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Shareholders' Equity (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Nov. 13, 2014
Equity, Class of Treasury Stock [Line Items]      
Cash dividends declared per share (in dollars per share) $ 0.20 $ 0.20  
Repurchase of shares (in shares) 129,000 1,057,115  
Treasury Stock, Value, Acquired, Cost Method $ 5,100,000 $ 32,100,000  
Remaining authorized repurchase capacity $ 108,500,000    
Share repurchase program 2014      
Equity, Class of Treasury Stock [Line Items]      
Authorized amount to be repurchased     $ 500,000,000.0