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, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Nov. 06, 2014
Equity [Abstract]
Increase in share repurchase authorized amount	$ 500,000,000.0	$ 300,000,000.0
Stock repurchase program, authorized amount										$ 400,000,000.0
Purchase of common stock (in shares)			9,600	866,823	19,143	369,810	876,000	389,000
Repurchase of shares of common stock			$ 1,435,000	$ 108,907,000	$ 2,962,000	$ 51,706,000	$ 110,300,000	$ 54,700,000
Remaining authorized repurchase amount			$ 712,000,000.0				$ 712,000,000.0
Common stock, authorized (in shares)			150,000,000				150,000,000		150,000,000
Common stock, par value (in dollars per share)			$ 0.01				$ 0.01		$ 0.01
Preferred stock, authorized (in shares)			5,000,000				5,000,000		5,000,000
Preferred stock, par value (in dollars per share)			$ 0.01				$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares)			0				0		0