Redeemable Noncontrolling Interest (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 55,393	$ 53,681
Acquisition of redeemable noncontrolling interest		2,836
Sale of additional shares to parent		(7,981)
Net income attributable to redeemable noncontrolling interests	1,826	1,438
Foreign currency translation adjustment attributable to noncontrolling interests	359	(651)
Ending balance	$ 57,578	$ 49,323