Subsequent Event (Details) - 2014 Stock Repurchase Plan - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	May. 09, 2016	Mar. 31, 2016
Subsequent Event [Line Items]
Shares repurchased during period		0.5
Cost of shares repurchased		$ 9.0
Average cost of shares repurchased (in dollars per share)		$ 18.86
Remaining authorized repurchase amount		$ 41.0
Subsequent Event
Subsequent Event [Line Items]
Shares repurchased during period	1.0
Cost of shares repurchased	$ 18.7
Average cost of shares repurchased (in dollars per share)	$ 18.54
Remaining authorized repurchase amount	$ 22.3