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v3.22.1

Subordinated Notes and Junior Subordinated Debentures - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 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 March 31, 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 | 3.71% | 3.01% |
Accrued interest payable | $ 56,000,000 | $ 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 | 2.61% | 1.98% |
Accrued interest payable | $ 12,000,000 | $ 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% | 1.78% |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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