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Loans (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Apr. 01, 2019 | Jul. 01, 2018
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  |  | $ 589,700,000 | $ 277,900,000
Loans and Leases Receivable, Deferred Income | $ 18,100,000 |  | $ 19,500,000 |  |  |
Troubled Debt Restructuring Included In Nonaccrual Loans | 16,200,000 |  | 20,900,000 |  |  |
TDRs included in accruing loan totals | 32,400,000 |  | 28,300,000 |  |  |
Nonaccrual Trouble Debt Restructuring Current | 6,100,000 |  | 10,500,000 |  |  |
Commitments to lend additional funds to borrowers whose terms had been modified in a TDR | 3,200,000 |  | 3,000,000 |  |  |
Specific reserves related to troubled debt restructuring | 200,000 |  | 300,000 |  |  |
Additional Specific Reserves Related To Troubled Debt Restructuring | 0 |  |  |  |  |
Loan Modifications on Nonacrrual status | $ 600,000 | $ 1,700,000 |  |  |  |
Loan past due period before entering default status | 30 days |  |  |  |  |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period | $ 1,000,000 | 1,000,000 |  |  |  |
Deposit Liabilities Reclassified as Loans Receivable | 2,100,000 |  | 1,100,000 |  |  |
PPP loans originated [Line Items] | 37,400,000 |  |  |  |  |
SBA Fees received |  |  |  | $ 20,200,000 |  |
SBA PPP Fees recognized | 1,500,000 | 4,600,000 |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables |  |  |  |  | 578,600,000 | 272,800,000
Goodwill, Purchase Accounting Adjustments | 3,800,000 |  | 4,200,000 |  |  |
Troubled Debt Restructuring, Classification removed | 171,000 | 3,900,000 |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 52,000 |  |  |  |
PPP Round 2 |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
SBA Fees received |  |  | 12,900,000 |  |  |
PPP loans receivable [Member] |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Loans and Leases Receivable, Deferred Income | 1,400,000 |  | 2,800,000 |  |  |
Accruing [Member] |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Loans modified during period | 4,000 | 300,000 |  |  |  |
Nonaccrual [Member] |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Loans modified during period | 1,000,000 | 700,000 |  |  |  |
Consumer [Member] |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Financing Receivable, Modifications, Recorded Investment, During Period | 12,000,000 | $ 9,800,000 |  |  |  |
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Business Combination, Acquired Receivable, Fair Value | $ 7,000,000 |  | $ 7,100,000 |  | 18,400,000 | 4,900,000
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  |  | $ 19,900,000 | $ 5,100,000

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