Subsequent Events (Details) - USD ($)		2 Months Ended	12 Months Ended
	Mar. 15, 2017	Mar. 01, 2017	Dec. 31, 2016	Dec. 31, 2015	Feb. 06, 2017	Aug. 19, 2015
Subsequent Event [Line Items]
Stock Repurchased During Period, Value			$ 65,300,000	$ 82,500,000
Stock Repurchase Program, Authorized Repurchase Amount						$ 100,000,000
Subsequent Event
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.075
Repurchase of common stock, Shares		594,048
Stock Repurchased During Period, Value		$ 34,170,000
Stock Repurchase Program, Authorized Repurchase Amount					$ 150,000,000.0