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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (PARENTHETICALS) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Other Comprehensive Income Loss Tax Portion Attributable To Parent Abstract        
Unrealized holding gains (losses) on available-for-sale securities tax $ (110) $ 1,203 $ (330) $ 1,717
Amortization and unrealized gains (losses) on interest rate agreements tax 13,513 9,042 20,562 8,404
Net unrealized gains (losses) on cash flow hedging transactions tax $ 5,650 $ (3,399) $ 5,417 $ (13,996)