CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (PARENTHETICALS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Comprehensive Income Loss Tax Portion Attributable To Parent Abstract
Unrealized holding gains (losses) on available-for-sale securities tax	$ (202)	$ (523)	$ (532)	$ 1,194
Amortization and unrealized gains (losses) on interest rate agreements tax	17,865	(18,399)	38,427	(9,995)
Net unrealized gains (losses) on cash flow hedging transactions tax	$ (2,243)	$ 11,401	$ 3,174	$ (2,595)