Common and Preferred Stock (Details) - USD ($)		1 Months Ended	3 Months Ended
	Dec. 01, 2015	Apr. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Nov. 06, 2014
Equity [Abstract]
Increase in share repurchase authorized amount	$ 300,000,000.0
Stock repurchase program, authorized amount						$ 400,000,000.0
Purchase of common stock (in shares)			369,810
Repurchase of shares of common stock			$ 51,706,000
Remaining authorized repurchase amount			$ 325,300,000
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
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase of common stock			$ 50,797,000	$ 0
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase of common stock		$ 900,000