Derivatives and Hedging Activities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Derivative	Dec. 31, 2020 USD ($)
Derivatives Fair Value [Line Items]
Interest rate swaps	$ 337	$ (137)
Cash collateral from counterparties	526,000	525,000
Interest Expense [Member]
Derivatives Fair Value [Line Items]
Interest rate swaps	60,000
Designated as Hedging Instrument | Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Notional amount	10,000	10,000
Interest rate swaps	137,000
Other Liabilities		137
Designated as Hedging Instrument | Interest Rate Swaps [Member] | Other Liabilities [Member]
Derivatives Fair Value [Line Items]
Interest rate swap derivative liability	137,000
Designated as Hedging Instrument | Interest Rate Swap 2020 [Member]
Derivatives Fair Value [Line Items]
Notional amount	5,000	5,000
Other Liabilities		68
Designated as Hedging Instrument | Interest Rate Swap 2021 [Member]
Derivatives Fair Value [Line Items]
Notional amount	5,000	5,000
Other Liabilities		69
Cash Flow Hedges on 90-day Advances from FHLB [Member]
Derivatives Fair Value [Line Items]
Other Liabilities	$ 10,000	5,000
Cash Flow Hedges on 90-day Advances from FHLB [Member] | Designated as Hedging Instrument | Interest Rate Swaps [Member]
Derivatives Fair Value [Line Items]
Number of notional interest rate swaps | Derivative	2
Cash Flow Hedges on 90-day Advances from FHLB [Member] | Designated as Hedging Instrument | Interest Rate Swap 2020 [Member]
Derivatives Fair Value [Line Items]
Notional amount	$ 5,000
Cash Flow Hedges on 90-day Advances from FHLB [Member] | Designated as Hedging Instrument | Interest Rate Swap 2021 [Member]
Derivatives Fair Value [Line Items]
Notional amount	5,000
Balance Sheet Hedges on 90-day Advances from FHLB [Member]
Derivatives Fair Value [Line Items]
Other Liabilities	$ 10,000	$ 5,000