Treasury Stock (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Class of Stock [Line Items]
Treasury stock, remaining number of shares authorized to be repurchased	8,237	4,539
Treasury Stock, Value	$ 402,082	$ 343,956
Treasury Stock, Shares, Acquired	1,302
Treasury Stock
Class of Stock [Line Items]
Treasury Stock, Value	402,082	343,956	309,585	309,585
Purchase of treasury shares	$ (58,126)	$ (34,371)	$ 0