Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) borrower loan	Dec. 31, 2021 USD ($)
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Specific reserve allocations for TDR's	$ 0.4	$ 0.5
Troubled debt restructuring loans	$ 12.5	12.6
Number of loans to defaulted borrowers \| loan	0
Acquisition, development and construction
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Loans defaulted under the restructured terms	$ 2.3
Number of loans to defaulted borrowers \| loan	3
Number of borrower defaulted \| borrower	2
Commercial Borrower Two \| Acquisition, development and construction
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Loans defaulted under the restructured terms	$ 2.0
Commercial Borrower One \| Acquisition, development and construction
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Loans defaulted under the restructured terms	0.3
Accruing
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Troubled debt restructuring loans	$ 4.5	$ 4.5
Accruing \| Portfolio Risk \| Troubled Debt Restructured Loans
Details related to loans identified as Troubled Debt Restructurings (TDRs):
Percentage of total impaired loans	20.00%	21.00%

Represents the number of borrowers defaulted.

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