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Fair Value Measurement (Tables)
3 Months Ended
Mar. 31, 2016
Fair Value of Financial Instruments [Abstract]  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
The following tables present our financial assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value.
  
 
 
 
 
 
Fair Value Measurements at March 31, 2016
 
 
 
 
 
 
Quoted Prices in
 
Significant Other
 
Significant
 
 
 
 
 
 
Active Markets for
 
Observable
 
Unobservable
 
 
 
 
 
 
Identical Assets
 
Inputs
 
Inputs
 
 
 
Total
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Short-term investments
 
$
95,755
 
$
 
$
95,755
 
$
 
Foreign currency forward exchange contracts not accounted for using hedge accounting
 
 
431
 
 
 
 
431
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$
96,186
 
$
 
$
96,186
 
$
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate swaps
 
$
1,395
 
$
 
$
1,395
 
$
 
 
 
 
 
 
 
Fair Value Measurements at December 31, 2015
 
 
 
 
 
 
Quoted Prices in
 
Significant Other
 
Significant
 
 
 
 
 
 
Active Markets for
 
Observable
 
Unobservable
 
 
 
 
 
 
Identical Assets
 
Inputs
 
Inputs
 
 
 
Total
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Short-term investments
 
$
82,847
 
$
 
$
82,847
 
$
 
Foreign currency forward exchange contracts not accounted for using hedge accounting
 
 
123
 
 
 
 
123
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$
82,970
 
$
 
$
82,970
 
$
 
Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest rate swaps
 
$
1,026
 
$
 
$
1,026
 
$