Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk - Fair Value of Derivatives (Details)	1 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Jun. 30, 2022 USD ($) item	Dec. 31, 2021 USD ($) item
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Loan pool hedge	$ 50,000,000.0
Term of interest rate risk cash flow hedge	5 years
Amount of ineffectiveness, included in net income		$ 0
Interest Rate Products
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Notional Amount		25,800,000
Designated as Hedging Instrument [Member]
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative assets designated as hedging instruments, fair value		952,000
Derivative liabilities designated as hedging instruments, fair value		$ 1,759,000
Designated as Hedging Instrument [Member] | Interest Rate Products
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative assets designated as hedging instruments, classified in other assets			$ 808,000
Derivative liabilities designated as hedging instruments, fair value			$ 4,102,000
Designated as Hedging Instrument [Member] | Interest Rate Products | OSBC Affiliates
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative, number of transactions | item		2	2
Notional Amount		$ 75,774,000	$ 75,774,000
Derivative assets designated as hedging instruments, classified in other assets		952,000
Derivative liabilities designated as hedging instruments, classified in other liabilities		1,759,000	4,102,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Cash collateral pledged with financial institutions, dollars		1,800,000	17,200,000
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | OSBC Affiliates
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative assets designated as hedging instruments, classified in other assets			$ 808,000
Not Designated as Hedging Instrument [Member]
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative assets not designated as hedging instruments, fair value		1,970,000
Total Derivative liabilities not designated as hedging instruments, fair value		$ 1,821,000
Not Designated as Hedging Instrument [Member] | Interest Rate Products | Commercial Loan Customers
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative, number of transactions | item		24	26
Notional Amount		$ 147,754,000	$ 165,005,000
Interest rate derivatives, derivative assets not designated as hedging instruments, classified in other assets		1,817,000	2,686,000
Interest rate derivatives, derivative not designated as hedging instruments, classified in other liabilities		$ 1,817,000	$ 2,686,000
Weighted average maturity		3 years 7 months 6 days	3 years 10 months 24 days
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Cash collateral pledged with financial institutions, dollars		$ 3,000,000.0	$ 180,000,000,000
Investment securities pledged with financial institutions, dollars		$ 0	$ 0
Number of correspondent financial institutions where investment securities are pledged | item		1	1
Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments and Forward Contracts.
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative, number of transactions | item		42	3
Notional Amount		$ 11,088,000	$ 17,173,000
Interest rate derivatives, derivative assets not designated as hedging instruments, classified in other assets		$ 153,000
Interest rate derivatives, derivative not designated as hedging instruments, classified in other liabilities			$ 21,000
Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments and Forward Contracts. | Commercial Loan Customers
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative, number of transactions | item			87
Notional Amount			$ 34,414,000
Interest rate derivatives, derivative assets not designated as hedging instruments, classified in other assets			508,000
Not Designated as Hedging Instrument [Member] | Other Contracts
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Derivative, number of transactions | item		3
Notional Amount		$ 16,927,000
Derivative assets designated as hedging instruments, classified in other assets			3,194,000
Derivative liabilities designated as hedging instruments, classified in other liabilities			$ 2,707,000
Interest rate derivatives, derivative not designated as hedging instruments, classified in other liabilities		4,000
Interest Income [Member]
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Amount to be reclassified as an increase to interest expense during the next twelve months		101,000
Interest Expense [Member]
Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk
Amount to be reclassified as an increase to interest expense during the next twelve months		$ 117,000