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Stock Repurchase Program (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Nov. 08, 2012
November 2012 shares authorized
Stock Repurchase Program          
Authorized shares to be repurchased 80,800,000   80,800,000   8,000,000
Shares available for repurchase 8,400,000   8,400,000    
Number of shares of common stock repurchased 1,465,000 1,396,000 2,826,000 3,159,000  
Total cost of repurchases $ 68,283 $ 63,106 $ 136,600 $ 130,088