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Derivatives - Fair Value of Derivative Contracts (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative contracts, Assets $ 1,434 $ 1,999
Derivative contracts, Liabilities 287 1,134
Interest Rate Swaps [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative contracts, Assets 327 256
Foreign Exchange Swaps [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative contracts, Assets 191 883
Derivative contracts, Liabilities 11 375
Foreign Exchange/Commodities Options [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative contracts, Assets 108  
Derivative contracts, Liabilities 3 537
Futures [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative contracts, Assets 808 39
Derivative contracts, Liabilities $ 273 44
Forwards [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative contracts, Assets   821
Derivative contracts, Liabilities   $ 178