Financial Derivatives and Hedging Activities - Fair Values of Derivative Instruments (Detail) - Forward Foreign Currency Exchange Contracts [Member] - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
---|---|---|
Designated as Hedging [Member] | Prepaid Expenses and Other Current Assets [Member] | ||
Derivatives Fair Value [Line Items] | ||
Derivative asset, fair value | $ 2,625 | $ 955 |
Designated as Hedging [Member] | Other Current Liabilities [Member] | ||
Derivatives Fair Value [Line Items] | ||
Derivative liability, fair value | 1,493 | 1,545 |
Not Designated as Hedging [Member] | Prepaid Expenses and Other Current Assets [Member] | ||
Derivatives Fair Value [Line Items] | ||
Derivative asset, fair value | 60 | 68 |
Not Designated as Hedging [Member] | Other Current Liabilities [Member] | ||
Derivatives Fair Value [Line Items] | ||
Derivative liability, fair value | $ 104 | $ 49 |