Subsequent Event (Details) - USD ($) $ in Millions	Apr. 25, 2017	Mar. 31, 2017	Feb. 24, 2016
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount			$ 150.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 114.6
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount	$ 250.0