Other Operating Expenses - Components of Other Operating Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Director fees	$ 527	$ 724	$ 576
Charitable donations & sponsorships	575	518	432
Printing and supplies	437	272	251
Travel and entertainment	579	456	339
Physical security	86	131	172
Postage and mailing	246	201	229
Miscellaneous expense	337	(331)	885
Total other operating expenses	3,199	2,264	3,144
Membership
Dues and memberships	$ 412	$ 293	$ 260