Accumulated Comprehensive Income (Loss), By Component (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance		$ 194,259	$ 154,774
Other comprehensive income (loss) before reclassifications (net of tax)		(1,618)	3,424
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)		33	123
Other comprehensive income (loss), net of tax		(1,585)	3,547
Balance		198,807	159,923
Accumulated Other Comprehensive Loss [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance		2,587	(629)
Other comprehensive income (loss), net of tax		(1,585)	3,547
Balance		1,002	2,918
Unrealized Gain (Loss) on Available for Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]	6,058	2,290
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	(3,235)	3,424
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	(39)	0
Other comprehensive income (loss), net of tax	[1]	(3,274)	3,424
Balance	[1]	2,784	5,714
Defined Benefit Pension Items [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]	(3,462)	(2,919)
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	0	0
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	72	123
Other comprehensive income (loss), net of tax	[1]	72	123
Balance	[1]	(3,390)	(2,796)
Unrealized Loss on Interest Rate Swap [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	[1]	(9)	$ 0
Other comprehensive income (loss) before reclassifications (net of tax)	[1]	1,617
Amounts reclassified from accumulated other comprehensive income (loss) (net of tax)	[1]	0
Other comprehensive income (loss), net of tax	[1]	1,617
Balance	[1]	$ 1,608

[1] Amounts in parentheses indicate debits on the Consolidated Balance Sheet.