Other Comprehensive Income - Summary of Change in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 416,137	$ 304,966	$ 262,830
Comprehensive Income (Loss)	(15,468)	8,135	10,935
Ending balance	442,847	416,137	304,966
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	15,074	6,939	(3,996)
Comprehensive Income (Loss)	(15,468)	8,135	10,935
Ending balance	(394)	15,074	6,939
Unrealized gains (losses) on securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	15,338	7,198	(3,534)
Comprehensive Income (Loss)	(16,044)	8,140	10,732
Ending balance	(706)	15,338	7,198
Unrealized gain on postretirement benefits plan
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	343	124	(304)
Comprehensive Income (Loss)	275	219	428
Ending balance	618	343	124
Unrealized loss on interest rate swap
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(607)	(383)	(158)
Comprehensive Income (Loss)	301	(224)	(225)
Ending balance	$ (306)	$ (607)	$ (383)