Derivatives - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) Derivatives	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Derivatives	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Risk participation Agreements [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 218	$ (160)	$ 1,371	$ (2,122)
Risk Participation Agreements Purchased [Domain]
Risk participation Agreements [Line Items]
Number of interest rate swaps | Derivatives	35		35
Risk Participation Agreements Sold [Domain]
Risk participation Agreements [Line Items]
Number of interest rate swaps | Derivatives	16		16
Interest Rate Swap [Member]
Risk participation Agreements [Line Items]
Derivative Instruments Designated As Hedging Instruments Interest Expense	$ 248	208	$ 710	219
Derivative, Gain (Loss) on Derivative, Net	(272)		(115)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Fair Value, Net	2,890		2,890		$ 3,665
Derivative, Notional Amount	420,000		420,000		70,000
Forward Contracts [Member]
Risk participation Agreements [Line Items]
Derivative Liability, Cost Basis, Gross Asset	11,100		11,100		25,000
Derivative Liability, Fair Value, Gross Asset	12,500		12,500		28,400
Derivative Liability, Notional Amount, Gross Asset	38,500		38,500		47,900
Derivative, Gain (Loss) on Derivative, Net	(400)		(1,300)
Forward Contracts [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Fair Value, Net	(182)		(182)		483
Derivative, Notional Amount	36,000		36,000		65,000
Derivative, Gain (Loss) on Derivative, Net	(265)	(102)	(666)	132
Foreign Exchange [Member]
Risk participation Agreements [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	2	$ 3	7	$ 15
Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Fair Value, Net	(17)		(17)		5
Derivative, Notional Amount	2,589		2,589		2,119
Derivative Liability, Cost Basis, Gross Asset	2,600		2,600		2,100
Derivative Liability, Fair Value, Gross Asset	2,600		2,600		$ 2,100
Interest Rate Macro Swap | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	350,000		$ 350,000
Derivative, Underlying			350.0 million
Interest Rate Swap Member - Debt | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	70,000		$ 70,000
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
Four Year Oiriginal Maturity | Interest Rate Macro Swap | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	175,000		175,000
Five Year Original Maturity | Interest Rate Macro Swap | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	150,000		150,000
Three Year Original Maturity | Interest Rate Macro Swap | Designated as Hedging Instrument [Member]
Risk participation Agreements [Line Items]
Derivative, Notional Amount	$ 25,000		$ 25,000