Redeemable Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance	$ 43,717	$ 45,825	$ 47,297	$ 46,673	$ 45,156	$ 50,998			$ 47,297	$ 50,998
Acquisition of redeemable noncontrolling interest										2,836
Sale of additional shares to parent									(15,496)	(9,531)
Net income from continuing operations attributable to redeemable noncontrolling interest	(2,337)	(1,553)	(1,796)	(98)	(983)	(80)	$ 929	$ (1,175)	(7,387)	(1,298)	$ 4,266
Contribution to maintain ownership percentage										6,135
Foreign currency translation adjustment attributable to noncontrolling interest									(1,460)	(1,784)
Effective portion of cash flow hedge									(154)	(59)	0
Ending balance	$ 25,662	$ 43,717	$ 45,825	$ 49,765	$ 46,673	$ 45,156			$ 22,800	$ 47,297	$ 50,998