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Fair Value of Financial Instruments (Tables)
9 Months Ended
Jun. 30, 2013
Fair Value of Financial Instruments  
Summary of liabilities measured at fair value on a recurring basis

  The following table summarizes liabilities measured at fair value on a recurring basis at June 30, 2013:

 
  Level 1
  Level 2
  Level 3
 

Assets (liabilities):

                   

Current:

                   

Interest rate swaps (included in other current liabilities)

  $   $ (5,952 ) $  

Cross currency swaps (included in other current liabilities)

  $   $   $ (2,841 )

Non-current:

                   

Cross currency swaps (included in other assets)

  $   $   $ 426  

Interest rate swaps (included in other liabilities)

  $   $ (2,004 ) $  

Cross currency swaps (included in other liabilities)

  $   $   $ (220 )

        The following table summarizes liabilities measured at fair value on a recurring basis at September 30, 2012:

 
  Level 1
  Level 2
  Level 3
 

Assets (liabilities):

                   

Current:

                   

Interest rate swaps (included in other current liabilities)

  $   $ (7,751 ) $  

Cross currency swaps (included in other current liabilities)

  $   $   $ (3,818 )

Non-current:

                   

Interest rate swaps (included in other liabilities)

  $   $ (5,777 ) $  

Cross currency swaps (included in other liabilities)

  $   $   $ (21,044 )

        

Schedule of the Level 3 activity related to cross currency swaps
 
  Three Months
Ended
June 30, 2013

  Three Months
Ended
June 30, 2012

  Nine Months
Ended
June 30, 2013

  Nine Months
Ended
June 30, 2012

 

Beginning balance:

  $ (6,127 ) $ (18,859 ) $ (24,862 ) $ (11,126 )

Unrealized gain (loss) on cross currency swaps

    3,492     5,009     22,227     (2,724 )
   
 
 
 
 

Ending balance:

  $ (2,635 ) $ (13,850 ) $ (2,635 ) $ (13,850 )
   
 
 
 
 
Schedule of effect of derivative instruments designated as cash flow and net investment hedging instruments
 
  Amount of Gain or
(Loss) Recognized in
OCI on Derivative
(Effective Portion)

  Amount of Gain or
(Loss) Reclassified
from Accumulated
OCI into Income
(Effective Portion)

  Amount of Gain or
(Loss) Recognized
in OCI on
Derivative (Effective
Portion)

  Amount of Gain or
(Loss) Reclassified
from Accumulated
OCI into Income
(Effective Portion)

 
 
  Three Months Ended
June 30, 2013

  Three Months Ended
June 30, 2013

  Nine Months Ended
June 30, 2013

  Nine Months Ended
June 30, 2013

 

Cash Flow Hedges:

                         

Interest rate swaps

  $ (695 ) $ (1,855 ) $ (2,607 ) $ (6,029 )

Net Investment Hedges:

                         

Cross currency swaps

    877         12,822      
   
 
 
 
 

Total

  $ 182   $ (1,855 ) $ 10,215   $ (6,029 )