Subsequent Events (Details) - Share Repurchase Program [Member] - USD ($)	Jul. 27, 2017	Jun. 30, 2017	Feb. 22, 2016
Subsequent Event [Line Items]
Share repurchase program, authorized amount			$ 150,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 56,700,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Share repurchase program, authorized amount	$ 100,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 56,700,000