Subsequent Events (Details) - USD ($)	Oct. 17, 2016	Sep. 30, 2016
Subsequent Event [Line Items]
Remaining authorized repurchase amount		$ 98,800,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock repurchase program, additional authorized amount	$ 300,000,000
Remaining authorized repurchase amount	$ 398,800,000
Modified Dutch Auction Maximum Shares	5,494,505
Modified Dutch Auction Minimum Share Price	$ 45.50
Modified Dutch Auction Maximum Share Price	$ 52.25
Modified Dutch Auction Maximum Amount (in dollars)	$ 250,000,000