Subsequent Events (Details) - USD ($)	Sep. 02, 2015	Sep. 05, 2012
Share repurchase program approved September 5, 2012
Subsequent Event [Line Items]
Share repurchase program authorized amount		$ 50,000,000
Share repurchase program approved September 2, 2015 | Subsequent Event
Subsequent Event [Line Items]
Share repurchase program authorized amount	$ 200,000,000
Line of Credit | Credit Agreement 2010 | Subsequent Event
Subsequent Event [Line Items]
Debt instrument, covenant, aggregate amount of addbacks to consolidated EBITDA (up to)	$ 75,000,000