Common and Preferred Stock (Details) - USD ($)			3 Months Ended		6 Months Ended
	Mar. 17, 2020	Dec. 01, 2015	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Equity [Abstract]
Increase in share repurchase authorized amount	$ 500,000,000.0	$ 300,000,000.0
Purchase of common stock (in shares)			9,600	866,823	0	876,000
Repurchase of shares of common stock			$ 1,435,000	$ 108,907,000		$ 110,300,000
Remaining authorized repurchase amount					$ 712,000,000.0
Common stock, authorized (in shares)					150,000,000		150,000,000
Common stock, par value (in dollars per share)					$ 0.01		$ 0.01
Preferred stock, authorized (in shares)					5,000,000		5,000,000
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares)					0		0