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Fair Value Measurements (Details) (Fair value on a recurring basis, USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Fair Value
  
Fair value assets and liabilities measured on recurring basis:  
Marketable equity securities $ 35
Total fair value assets and liabilities measured on recurring basis (9,309)
Fair Value | Interest-rate swap contracts
  
Fair value assets and liabilities measured on recurring basis:  
Derivative assets 2,035
Derivative liabilities (8,292)
Fair Value | Currency swap contracts
  
Fair value assets and liabilities measured on recurring basis:  
Derivative liabilities (3,254)
Fair Value | Warrants
  
Fair value assets and liabilities measured on recurring basis:  
Derivative assets 167
Level 1
  
Fair value assets and liabilities measured on recurring basis:  
Marketable equity securities 35
Total fair value assets and liabilities measured on recurring basis 35
Level 2
  
Fair value assets and liabilities measured on recurring basis:  
Total fair value assets and liabilities measured on recurring basis (9,511)
Level 2 | Interest-rate swap contracts
  
Fair value assets and liabilities measured on recurring basis:  
Derivative assets 2,035
Derivative liabilities (8,292)
Level 2 | Currency swap contracts
  
Fair value assets and liabilities measured on recurring basis:  
Derivative liabilities (3,254)
Level 3
  
Fair value assets and liabilities measured on recurring basis:  
Total fair value assets and liabilities measured on recurring basis 167
Level 3 | Warrants
  
Fair value assets and liabilities measured on recurring basis:  
Derivative assets $ 167