Commitments and Contingencies - Narrative (Details) $ in Thousands			3 Months Ended		12 Months Ended
	Nov. 05, 2021 USD ($) wireTransfer	May 18, 2021 USD ($) beneficiary	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Rent expense			$ 1,770	$ 1,702
Commitments including funding of fixed-rate loans			189,908		$ 144,701
Commitments including funding of variable-rates loans			1,181,763		987,584
Maximum potential amount of future payments required under the Commitments			12,880		12,870
Standby Letters of Credit
Loss Contingencies [Line Items]
Standby letters of credit commitment			$ 11,421		$ 11,729
Trust Administration Litigation
Loss Contingencies [Line Items]
Number of remainder Trust beneficiaries | beneficiary		2
Loss contingency, damages sought, value		$ 19,700
Wire Transfer Litigation
Loss Contingencies [Line Items]
Number of purportedly fraudulent and unauthorized wire transfers | wireTransfer	6
Loss contingency, damages sought, value	$ 5,100
Minimum
Loss Contingencies [Line Items]
Fixed-rate interest			0.85%		0.85%
Maturity period			1 month	1 month
Maximum
Loss Contingencies [Line Items]
Fixed-rate interest			18.00%		18.00%
Maturity period			25 years	26 years