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Redeemable Noncontrolling Interest (Tables)
 12 Months Ended
Sep. 30, 2014
Noncontrolling Interest [Abstract]  
Redeemable noncontrolling interest
The following table provides a summary of the activities in our redeemable noncontrolling interest during the years ended September 30, 2014 and 2013:
 
Redeemable Noncontrolling Interest
 
(in thousands)
Balance as of September 30, 2012
$
53,681

Acquisition of redeemable noncontrolling interest
2,836

Sale of additional shares to parent
(9,531
)
Net income attributable to redeemable noncontrolling interest
4,348

Contribution to maintain ownership percentage
6,135

Foreign currency translation adjustment attributable to noncontrolling interest
(2,017
)
Effective portion of cash flow hedge
(59
)
Balance as of September 30, 2013
$
55,393

Sale of additional shares to parent
(23,181
)
Net income attributable to redeemable noncontrolling interest
4,208

Foreign currency translation adjustment attributable to noncontrolling interest
(768
)
Effective portion of cash flow hedge
(154
)
Balance as of September 30, 2014
$
35,498