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Capital Stock (Details) - USD ($)
Jul. 09, 2021
Jun. 30, 2021
Dec. 31, 2020
Feb. 06, 2020
Subsequent Event [Line Items]        
Shares of common stock authorized (in shares)   100,000,000 100,000,000.0  
Shares issued and outstanding (in shares)   49,800,000 49,500,000  
Maximum shares allowed for issuance (in shares)   2,000,000.0    
Par value (in dollars per share)   $ 10    
Subsequent Event        
Subsequent Event [Line Items]        
Dividends declared (in dollars per share) $ 0.20      
250 Million Share Repurchase Program        
Subsequent Event [Line Items]        
Stock repurchase program amount       $ 250,000,000
Stock repurchase program remaining amount   $ 200,000,000