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Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Consolidated Statements of Comprehensive Income [Abstract]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax $ 8,049 $ 8,771 $ 6,430
Other Comprehensive Income (Loss), Reclassification Adjustment for Derivative Interest Included in Net Income, Tax $ 4,988 $ 13,994 $ 14,005