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Debt - Senior Unsecured Notes Payable Narrative (Details) - Senior unsecured notes payable - USD ($)
Jun. 01, 2020
May 10, 2017
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]        
Debt instrument face amount     $ 300,000,000 $ 300,000,000
5.25% Senior Notes due 2025        
Debt Instrument [Line Items]        
Debt instrument face amount   $ 300,000,000.0    
Interest rate (percent)   5.25%    
Gross proceeds from issuance of senior notes   $ 300,000,000.0    
Net proceeds from issuance of senior notes   $ 294,000,000.0    
Redemption price, percentage upon change of control (percent) 101.00%