Fair Value - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available for sale securities:
Available for sale securities, Total Fair Value	$ 290,054	$ 294,076
Collateralized mortgage obligations- residential [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	90,708	101,461
Fair Value, Inputs, Level 1 [Member] | Collateralized mortgage obligations- residential [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Fair Value, Inputs, Level 2 [Member] | Collateralized mortgage obligations- residential [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	90,708	101,461
Fair Value, Inputs, Level 3 [Member] | Collateralized mortgage obligations- residential [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Obligations of U.S. government corporations and agencies [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	2,531	2,503
Obligations of U.S. government corporations and agencies [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Obligations of U.S. government corporations and agencies [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	2,531	2,503
Obligations of U.S. government corporations and agencies [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Mortgage-backed - residential
Available for sale securities:
Available for sale securities, Total Fair Value	82,080	74,710
Mortgage-backed - residential | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Mortgage-backed - residential | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	82,080	74,710
Mortgage-backed - residential | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
REMICs [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	2,087	2,709
REMICs [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
REMICs [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	2,087	2,709
REMICs [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Preferred stock
Available for sale securities:
Available for sale securities, Total Fair Value	1
Preferred stock | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	1
Preferred stock | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0
Preferred stock | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0
Corporate bonds [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	12,970	12,806
Corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	12,970	12,806
Corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Obligations of state and political subdivisions [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	99,677	99,887
Obligations of state and political subdivisions [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Obligations of state and political subdivisions [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	99,677	99,887
Obligations of state and political subdivisions [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Mortgage banking derivative - asset [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	1,657	367
Mortgage banking derivative - asset [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Mortgage banking derivative - asset [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	1,657	367
Mortgage banking derivative - asset [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Mortgage banking derivative - liability [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	73
Mortgage banking derivative - liability [Member] | Fair Value, Inputs, Level 1 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	0
Mortgage banking derivative - liability [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	0	73
Mortgage banking derivative - liability [Member] | Fair Value, Inputs, Level 3 [Member]
Available for sale securities:
Available for sale securities, Total Fair Value	$ 0	$ 0