Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Derivatives and Hedging Activities (Schedule of Balance Sheet Classification and Fair Values of Derivative Instruments) (Details)

v3.8.0.1
Derivatives and Hedging Activities (Schedule of Balance Sheet Classification and Fair Values of Derivative Instruments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Derivatives, Fair Value [Line Items]    
Notional amount of derivative asset $ 76,600  
Fair value (696) $ 1,368
Notional amount 88,490 69,137
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Other current assets [Member]    
Derivatives, Fair Value [Line Items]    
Fair value derivative asset 177 1,440
Notional amount of derivative asset 19,029 39,982
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] | Accrued expenses and other current liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Fair value derivative liability (948) (48)
Notional amount of derivative liability 57,572 13,273
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Other current assets [Member] | Cash Flow Hedge [Member]    
Derivatives, Fair Value [Line Items]    
Fair value derivative asset 75 37
Notional amount of derivative asset 11,889 8,348
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] | Accrued expenses and other current liabilities [Member] | Cash Flow Hedge [Member]    
Derivatives, Fair Value [Line Items]    
Fair value derivative liability (61)
Notional amount of derivative liability $ 7,534