Quarterly report pursuant to Section 13 or 15(d)

Stock Repurchase Program (Details)

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Stock Repurchase Program (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Mar. 31, 2011
Feb. 28, 2011
February 2011 shares authorized
Stock Repurchase Program          
Authorized shares to be repurchased 72,800,000   72,800,000   10,000,000
Shares available for repurchase 4,600,000   4,600,000    
Number of shares of common stock repurchased 1,341,000 1,286,000 4,510,000 4,817,000  
Total cost of repurchases $ 66,934 $ 57,810 $ 196,906 $ 175,071