XML 53 R42.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial Instruments and Risk Management (Additional Information) (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2017
USD ($)
Derivative [Line Items]  
Amount expected to be reclassified into earnings $ (16,432)
Foreign Exchange Contract | Designated as Hedging Instrument | Short  
Derivative [Line Items]  
Commitments to sell and purchase foreign currencies in foreign currency cash flow hedge derivative portfolio $ 588,866