Stockholders' Equity - Repurchase Program (Details) - USD ($)			3 Months Ended	14 Months Ended
	May 08, 2017	Feb. 04, 2016	Mar. 31, 2017	Mar. 31, 2017
Class of Stock [Line Items]
Shares repurchased (in shares)			0	1,670,311
Common Stock
Class of Stock [Line Items]
Stock repurchase program, approved amount		$ 500,000,000
Stock repurchase program, authorized time period		18 months
Subsequent Event
Class of Stock [Line Items]
Shares repurchased (in shares)	411,166
Repurchase agreements
Class of Stock [Line Items]
Shares repurchased				$ 240,100,000
Repurchase agreements | Subsequent Event
Class of Stock [Line Items]
Shares repurchased	$ 52,400,000