Derivatives - Schedule of Changes in Fair Value of Derivative Assets and Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (33)	$ 0	$ 420	$ 789
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	221
Derivative, Gain (Loss) on Derivative, Net	(45)	0	(88)	789
Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)			0	(432)
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Instruments Designated As Hedging Instruments Interest Income	0	(193)	(118)	(424)
Derivative Instruments Designated As Hedging Instruments Interest Expense	(70)	0	(70)	0
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	0	7	10
Forward Contracts [Member]
Derivative [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	125	0	96
Derivative, Gain (Loss) on Derivative, Net	12		500
Foreign Exchange [Member]
Derivative [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	3	2	4	10
Designated as Hedging Instrument [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 201	$ 0	$ 122	$ 0