Common Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jan. 28, 2015	Apr. 23, 2014	Apr. 23, 2013	Oct. 24, 2012	Nov. 01, 2011
Common Stock
Approved stock repurchase program, authorized amount				$ 450,000	$ 200,000	$ 150,000	$ 100,000	$ 100,000
Repurchase of common stock (in shares)	7,731,428	3,110,114
Repurchase of common stock, amount	$ 298,344	$ 121,776	$ 84,677
Remaining capacity under the stock repurchase program	$ 301,400			$ 25,400