Interest Rate Swaps (Narrative) (Details) (Interest Rate Swap [Member], USD $)	3 Months Ended			9 Months Ended		3 Months Ended	9 Months Ended
	Jun. 30, 2013 Swap	Jun. 30, 2012	Jun. 30, 2013 Cash Flow Hedging [Member]	Jun. 30, 2013 Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Expense [Member]	Jun. 30, 2013 Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Expense [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Revolving Credit Facility [Member]
Derivative [Line Items]
Number of interest rate swap agreements	5
Notional amount of interest rate swap agreements	$ 50,000,000
Amount of hedged item								250,000,000
Interest rate fixed as result of interest rate swap hedges								3.40%
Unrealized gain recognized in OCI			500,000	1,300,000
Loss reclassified from AOCI into income						400,000	1,300,000
Interest rate derivative contracts that will be reclassified to earnings during the next twelve months					1,500,000
Gain (loss) on interest rate fair value hedge ineffectiveness	$ 0	$ 0