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Consolidated Statements of Income and Comprehensive Income (Parentheticals) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Unrealized loss on interest rate swap, tax benefit (in Dollars)	$ 370,000	$ 106,000	$ (72,000)

Tax effect of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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