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Redeemable Noncontrolling Interest (Tables)
6 Months Ended
Mar. 31, 2013
Noncontrolling Interest [Abstract]  
Summary of activities in redeemable noncontrolling interests
The following table provides a summary of the activities in our redeemable noncontrolling interests as of March 31, 2013 and 2012:
 
Redeemable Noncontrolling Interests
 
(in thousands)
Balance as of September 30, 2011
$

Acquisition of redeemable noncontrolling interest
36,300

Net income attributable to redeemable noncontrolling interests
112

Foreign currency translation adjustment attributable to noncontrolling interests
496

Balance as of March 31, 2012
$
36,908

 
 
Balance as of September 30, 2012
$
53,681

Acquisition of redeemable noncontrolling interest
2,836

Sale of additional shares to parent
(7,981
)
Net income attributable to redeemable noncontrolling interests
2,337

Foreign currency translation adjustment attributable to noncontrolling interests
2,109

Balance as of March 31, 2013
$
52,982