Quarterly report pursuant to Section 13 or 15(d)

Foreign Currency Exchange Contracts and Hedging - Additional Information (Details)

v3.7.0.1
Foreign Currency Exchange Contracts and Hedging - Additional Information (Details)
6 Months Ended
Jun. 30, 2017
USD ($)
Contract
Jun. 30, 2016
USD ($)
Contract
Derivatives Fair Value [Line Items]    
Number of contract designated hedges | Contract 13 11
Number of contract non-designated hedges | Contract 4  
Non-Designated Derivative Contracts    
Derivatives Fair Value [Line Items]    
Derivative contracts notional amounts $ 2,529,000 $ 882,000
Designated Derivative Contracts    
Derivatives Fair Value [Line Items]    
Derivative contracts notional amounts 8,644,000 2,280,000
Unrealized (loss) gain on derivative $ (254,000) $ 15,000
Minimum    
Derivatives Fair Value [Line Items]    
Derivative contracts expiration period 1 month  
Maximum    
Derivatives Fair Value [Line Items]    
Derivative contracts expiration period 6 months