Common Stock (Details) (USD $)	0 Months Ended					12 Months Ended
	Jun. 30, 2014	Apr. 23, 2014	Apr. 23, 2013	Oct. 24, 2012	Nov. 01, 2011	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Common Stock
Approved stock repurchase program, authorized amount		$ 200,000,000	$ 150,000,000	$ 100,000,000	$ 100,000,000
Repurchase of common stock (in shares)						3,110,114	3,064,151
Repurchase of common stock, amount						121,776,000	84,677,000	46,105,000
Remaining capacity under the stock repurchase program	$ 175,100,000	$ 37,500,000