Derivative Instruments - Additional Information (Detail)	Sep. 30, 2017 USD ($) Derivative	Dec. 31, 2016 Derivative	Nov. 30, 2016 USD ($)
Foreign Exchange Forward
Derivative Instruments And Hedging Activities [Line Items]
Foreign exchange forward contracts outstanding | Derivative	0	0
Cash flow Hedge | Interest Rate Swap
Derivative Instruments And Hedging Activities [Line Items]
Derivate Notional Amount | $	$ 288,800,000		$ 300,000,000
Fixed interest rate swap			3.16%