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Loans and Allowance for Loan Losses - Additional Information (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) Contract | Mar. 31, 2021 USD ($) Contract | Dec. 31, 2021 USD ($) Loan | Dec. 31, 2020 USD ($) Loan
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |
Qualifying loans pledged to secure the line of credit from FHLB | $ 361,000,000.0 |  | $ 343,600,000 |
Troubled debt restructurings that have subsequently defaulted, recorded investment | $ 0 | $ 0 |  |
Troubled Debt Restructurings that have Subsequently Defaulted, Number of Contracts | Contract | 0 | 0 |  |
Allowance for loan losses | $ 8,806,000 |  | 8,559,000 | $ 6,361,000
Modified Loan Terms |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |
Allowance for loan losses | 6,000 |  | 10,000 |
90 Days or Greater Past Due |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |
Total Past Due | $ 0 |  | $ 0 |
Small Business Administration |  |  |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |  |  |
Number of paycheck protection program loans | Loan |  |  | 730 | 1,171
Paycheck protection program loans |  |  | $ 66,100,000 | $ 130,300,000

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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
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- Definition Amount of financing receivable 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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