Premises and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Lease liability	$ 18,200	$ 18,600
Right-of-use asset	$ 17,100	$ 17,500
Operating lease, weighted average remaining lease term (in years)	11 years 9 months 18 days	12 years
Operating lease, weighted average discount rate, (as a percentage)	2.80%	2.80%
Finance lease, weighted average remaining lease term (in years)	1 year 9 months 18 days	1 year 9 months 18 days
Finance lease, weighted average discount rate, (as a percentage)	1.80%	2.00%
Operating lease liability	$ 18,202	$ 18,500
Finance lease liability	$ 41	100
Operating lease, right of use asset		$ 17,500