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Redeemable Noncontrolling Interest (Tables)
 3 Months Ended
Dec. 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 December 31, 2013 and 2012:
 
Redeemable Noncontrolling Interests
 
(in thousands)
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
1,438

Foreign currency translation adjustment attributable to noncontrolling interests
(651
)
Balance as of December 31, 2012
$
49,323

 
 
Balance as of September 30, 2013
$
55,393

Net income attributable to redeemable noncontrolling interests
1,826

Foreign currency translation adjustment attributable to noncontrolling interests
359

Balance as of December 31, 2013
$
57,578