Loans - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Loans
Collateral dependent loans	$ 18,988	$ 21,847
Collateral Coverage	38,237	46,256
Commercial non-owner occupied | Hotel
Loans
Collateral dependent loans	245	245
Collateral Coverage	$ 1,476	$ 846
Collateral Coverage (as a percent)	602.00%	345.00%
Commercial non-owner occupied | Office
Loans
Collateral dependent loans	$ 1,045	$ 1,045
Collateral Coverage	$ 1,350	$ 1,800
Collateral Coverage (as a percent)	129.00%	172.00%
Commercial non-owner occupied | Other
Loans
Collateral dependent loans	$ 398	$ 398
Collateral Coverage	$ 608	$ 648
Collateral Coverage (as a percent)	153.00%	163.00%
Commercial non-owner occupied | Retail
Loans
Collateral dependent loans	$ 294	$ 299
Collateral Coverage	$ 1,269	$ 1,269
Collateral Coverage (as a percent)	432.00%	424.00%
Commercial owner occupied real estate loan | Industrial
Loans
Collateral dependent loans	$ 738	$ 738
Collateral Coverage	$ 1,103	$ 1,103
Collateral Coverage (as a percent)	149.00%	149.00%
Commercial owner occupied real estate loan | Office
Loans
Collateral dependent loans	$ 1,076	$ 1,076
Collateral Coverage	$ 1,485	$ 1,485
Collateral Coverage (as a percent)	138.00%	138.00%
Commercial owner occupied real estate loan | Other
Loans
Collateral dependent loans	$ 3,676	$ 3,303
Collateral Coverage	$ 8,581	$ 7,285
Collateral Coverage (as a percent)	233.00%	221.00%
Consumer Owner Occupied Loans | Other
Loans
Collateral dependent loans	$ 4,250	$ 5,413
Collateral Coverage	$ 6,040	$ 9,286
Collateral Coverage (as a percent)	142.00%	172.00%
Home equity loans | Other
Loans
Collateral dependent loans	$ 3,002	$ 1,768
Collateral Coverage	$ 4,513	$ 2,679
Collateral Coverage (as a percent)	150.00%	152.00%
Commercial and industrial | Industrial
Loans
Collateral dependent loans		$ 291
Collateral Coverage		$ 702
Collateral Coverage (as a percent)	0.00%	241.00%
Commercial and industrial | Other
Loans
Collateral dependent loans	$ 1,710	$ 3,696
Collateral Coverage	$ 4,389	$ 8,442
Collateral Coverage (as a percent)	257.00%	228.00%
Other income producing property | Other
Loans
Collateral dependent loans	$ 2,209	$ 3,212
Collateral Coverage	$ 6,898	$ 10,186
Collateral Coverage (as a percent)	312.00%	317.00%
Consumer | Other
Loans
Collateral dependent loans	$ 345	$ 363
Collateral Coverage	$ 525	$ 525
Collateral Coverage (as a percent)	152.00%	145.00%