Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income
Net unrealized gain (loss) on securities available-for-sale	$ 11,815	$ 14,561
Net unrealized loss for unfunded status of defined benefit plan liability	(2,810)	(2,810)
Accumulated other comprehensive income, before taxes, total	9,005	11,751
Less: Tax effect	1,892	2,468
Net-of-tax amount	$ 7,113	$ 9,283