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Investment Securities - Narrative (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
state
security
Mar. 31, 2021
USD ($)
security
Dec. 31, 2021
USD ($)
security
Sep. 30, 2014
USD ($)
Debt Securities, Available-for-sale [Line Items]        
Number of securities temporarily impaired (security) | security 548 140 163  
Number of securities temporarily impaired for twelve months or more (security) | security 72 10 27  
Period of temporary impairment 12 months 12 months 12 months  
Amortized cost of securities transferred       $ 89,780,000
Fair value of securities transferred       89,757,000
Net unrealized loss, net of taxes on transferred securities       $ 15,000
Unamortized balance of net unrealized losses transferred $ 78,000 $ 124,000 $ 87,000  
Number of states | state 6      
FHLB stock investment $ 4,365,000 9,068,000 4,328,000  
Federal reserve bank stock 1,037,000 1,037,000 1,037,000  
Impairment losses 0      
Other equity securities        
Debt Securities, Available-for-sale [Line Items]        
Securities pledged as collateral $ 288,761,000 $ 241,990,000 $ 297,456,000