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Accumulated Other Comprehensive Loss - Components of Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail)
9 Months Ended
Sep. 30, 2016
USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]  
Unrealized gain on derivative instruments, tax $ 50,000
Unrealized gain on debt securities, tax 304,000
Deferred taxes recognized on related foreign currency translation adjustment 0
Currency Translation Adjustments [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Deferred taxes recognized on related foreign currency translation adjustment 0
Derivatives [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Unrealized gain on derivative instruments, tax 50,000
Debt Securities [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Unrealized gain on debt securities, tax $ 304,000