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Accumulated Other Comprehensive Loss - Components of Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail)
9 Months Ended
Sep. 30, 2015
USD ($)
Foreign Currency Translation Adjustments [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Deferred taxes recognized on related foreign currency translation adjustment $ 0
Change in Fair Value [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Unrealized gain on derivative instruments, tax 130,000
Accumulated Other Comprehensive Loss [Member]  
Accumulated Other Comprehensive Income Loss [Line Items]  
Unrealized gain on derivative instruments, tax 130,000
Deferred taxes recognized on related foreign currency translation adjustment $ 0