Subordinated Notes and Junior Subordinated Debentures - Additional Information (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal amount	$ 45,000,000	$ 45,000,000
Fixed-To-Floating Subordinate Notes Mature on July 1, 2030 | Subordinated Notes
Debt Instrument [Line Items]
Debt instrument, face amount			$ 75,000,000.0
Debt instrument, interest rate			6.00%
Debt instrument, maturity date			Jul. 01, 2030
Debt instrument, redemption, description	As of June 30, 2022, the net liability outstanding of the subordinated notes was $73.6 million. The Company may, at its option, redeem the notes, in whole or in part, on a semi-annual basis beginning on July 1, 2025, subject to obtaining the prior approval of the Federal Reserve to the extent such approval is then required.
Debt issuance costs			$ 1,700,000
Debt issuance costs, amortization period			10 years
Loans	$ 73,600,000
Fixed-To-Floating Subordinate Notes Mature on July 1, 2030 | Subordinated Notes | Three-Month Secured Overnight Financing Rate Plus 588 Basis Points
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	The subordinated notes bear a fixed interest rate of 6.00% until July 1, 2025 and a floating interest rate equal to a benchmark rate, which is expected to be the three-month SOFR, plus 588 basis points thereafter until maturity.
Metropolitan Statutory Trust 1
Debt Instrument [Line Items]
Principal amount	$ 35,000,000	$ 35,000,000
Metropolitan Statutory Trust 1 | Junior Subordinated Debentures
Debt Instrument [Line Items]
Debt instrument, maturity date	Mar. 17, 2034
Contractual rate	4.82%	3.01%
Accrued interest payable	$ 68,000	$ 45,000
Metropolitan Statutory Trust 1 | Junior Subordinated Debentures | Three-month LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	Three-monthLIBOR + 2.79%
Interest rate spread	2.79%	2.79%
First Evanston Bancorp Trust I
Debt Instrument [Line Items]
Principal amount	$ 10,000,000	$ 10,000,000
First Evanston Bancorp Trust I | Junior Subordinated Debentures
Debt Instrument [Line Items]
Debt instrument, maturity date	Mar. 15, 2035
Contractual rate	3.61%	1.98%
Accrued interest payable	$ 16,000	$ 9,000
First Evanston Bancorp Trust I | Junior Subordinated Debentures | Three-month LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	Three-monthLIBOR + 1.78%
Interest rate spread	1.78%