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Derivative Financial Instruments - Summary of Non-designated Hedges (Detail) - Not Designated as Hedging Instrument [Member]
€ in Thousands, CAD in Thousands, $ in Thousands
Mar. 31, 2017
USD ($)
DerivativeInstrument
Mar. 31, 2017
EUR (€)
DerivativeInstrument
Mar. 31, 2017
CAD
DerivativeInstrument
Dec. 31, 2016
USD ($)
DerivativeInstrument
Dec. 31, 2016
EUR (€)
DerivativeInstrument
Dec. 31, 2016
CAD
DerivativeInstrument
CAD [Member] | Interest Rate Swaps/Derivatives [Member]            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Number of Instruments 1 1 1 2 2 2
Notional Amount | CAD     CAD 18,327     CAD 37,221
EUR [Member] | Buy GBP / Sell EUR Forward [Member]            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Number of Instruments 1 1 1 1 1 1
Notional Amount | €   € 12,857     € 12,857  
USD [Member] | Interest Rate Swaps/Derivatives [Member]            
Derivative Instruments and Hedging Activities Disclosures [Line Items]            
Number of Instruments 2 2 2 3 3 3
Notional Amount | $ $ 72,960     $ 256,875