Subsequent Events (Details) (Subsequent Event [Member], USD $)	1 Months Ended
	Oct. 31, 2014
Subsequent Event [Line Items]
Share repurchase authorization, amount	$ 400,000,000
Revolving line of credit [Member]
Subsequent Event [Line Items]
Amount borrowed from credit facility	$ 50,000,000
Restricted Stock [Member]
Subsequent Event [Line Items]
Vesting period of awards	4 years
Restricted Stock [Member] | Executive employees [Member] | Common stock [Member]
Subsequent Event [Line Items]
Number of shares granted	271,451
Restricted Stock [Member] | Non-executive employees [Member] | Common stock [Member]
Subsequent Event [Line Items]
Number of shares granted	162,571