Redeemable Noncontrolling Interest (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance				$ 53,681				$ 0	$ 53,681	$ 0
Acquisition of redeemable noncontrolling interests									2,836	45,857
Sale of additional shares to parent									(9,531)
Net income from continuing operations attributable to redeemable noncontrolling interest	970	1,041	899	1,438	5,569	1,188	112	0	4,348	6,869	0
Contribution to maintain ownership percentage									6,135
Foreign currency translation adjustment attributable to noncontrolling interests									(2,017)	955
Effective portion of cash flow hedge									(59)	0	0
Ending balance	$ 55,393				$ 53,681				$ 55,393	$ 53,681	$ 0