Common and Preferred Stock (Details) - USD ($)			12 Months Ended
	Mar. 17, 2020	Dec. 01, 2015	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Nov. 06, 2014
Equity [Abstract]
Increase in share repurchase authorized amount	$ 500,000,000.0	$ 300,000,000.0
Authorized to be repurchased						$ 400,000,000.0
Purchase of common stock (in shares)			876,423	388,953	1,273,961
Repurchase of common stock			$ 110,342,000	$ 54,668,000	$ 173,926,000
Remaining authorized repurchase amount			$ 712,000,000.0
Common stock, shares authorized (in shares)			150,000,000	150,000,000
Common stock, par value (in dollars per share)			$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)			5,000,000	5,000,000
Preferred stock, par value (in dollars per share)			$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)			0	0