Derivatives - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) Derivatives	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Derivatives	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Risk participation Agreements [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$ 0	$ 0
Derivative, Gain (Loss) on Derivative, Net	$ (221)	(17)	$ (1,962)	$ (43)
Risk Participation Agreements Purchased [Domain]
Risk participation Agreements [Line Items]
Number of interest rate swaps | Derivatives	37		37
Risk Participation Agreements Sold [Domain]
Risk participation Agreements [Line Items]
Number of interest rate swaps | Derivatives	14		14
Interest Rate Swap [Member]
Risk participation Agreements [Line Items]
Derivative Instruments Designated As Hedging Instruments Interest Income	$ 0	0	$ 0	(118)
Derivative Instruments Designated As Hedging Instruments Interest Expense	66	0	11	0
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	0	0	7
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Fair Value, Net	4,316		4,316		$ (801)
Derivative, Notional Amount	70,000		70,000		70,000
Forward Contracts [Member]
Risk participation Agreements [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	0	0	0
Derivative Liability, Cost Basis, Gross Asset	19,900		19,900		9,800
Derivative Liability, Fair Value, Gross Asset	22,800		22,800		10,700
Derivative Liability, Notional Amount, Gross Asset	44,900		44,900		25,500
Derivative, Gain (Loss) on Derivative, Net	1,900		1,200
Forward Contracts [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Fair Value, Net	297		297		63
Derivative, Notional Amount	45,000		45,000		30,000
Derivative, Gain (Loss) on Derivative, Net	(248)	(15)	234	(79)
Foreign Exchange [Member]
Risk participation Agreements [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	8	$ (1)	12	1
Interest Rate Contract [Member]
Risk participation Agreements [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)			0	$ 0
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Fair Value, Net	0		0		41
Derivative, Notional Amount	2,121		2,121		4,789
Derivative Liability, Cost Basis, Gross Asset	2,100		2,100		4,800
Derivative Liability, Fair Value, Gross Asset	2,100		2,100		$ 4,800
2024 [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	30,000		30,000
2026 [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	$ 40,000		$ 40,000