Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance		$ 74,338
Ending balance		73,209	$ 68,319
Accumulated Net Unrealized Investment Gain (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	[1]	1,107	(3,686)
Other comprehensive income (loss) before reclassification	[1]	1,237	1,871
Ending balance	[1]	2,344	(1,815)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning balance	[1]	61	30
Other comprehensive income (loss) before reclassification	[1]	(4)	7
Ending balance	[1]	$ 57	$ 37

[1] All amounts are net of tax. Amounts in parentheses indicate debits.