Securities - Amortized Cost and Fair Value, Held to Maturity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 416,389,000	$ 0
Gross Unrealized Gains	334,000
Gross Unrealized Losses	(1,171,000)
Fair Value	415,552,000
Impairment	0	0	$ 0
Allowance for credit losses - held to maturity securities	(32,000)	0
Held-to-maturity securities, net of allowance for credit losses	416,357,000	$ 0
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	267,641,000
Gross Unrealized Gains	333,000
Gross Unrealized Losses	(685,000)
Fair Value	267,289,000
Residential mortgage backed securities:
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	24,832,000
Gross Unrealized Gains	0
Gross Unrealized Losses	(92,000)
Fair Value	24,740,000
Other debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	22,049,000
Gross Unrealized Gains	0
Gross Unrealized Losses	(79,000)
Fair Value	21,970,000
Government agency mortgage backed securities | Residential mortgage backed securities:
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	60,507,000
Gross Unrealized Gains	1,000
Gross Unrealized Losses	(198,000)
Fair Value	60,310,000
Government agency mortgage backed securities | Commercial mortgage backed securities:
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,855,000
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	1,855,000
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	39,505,000
Gross Unrealized Gains	0
Gross Unrealized Losses	(117,000)
Fair Value	$ 39,388,000