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Securities - Schedule of Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
SECURITIES AVAILABLE FOR SALE
Fair Value, Less than 12 Months	$ 67,237	$ 51,045
Unrealized Losses, Less than 12 Months	1,283	509
Fair Value, 12 Months or More	83,162	64,109
Unrealized Losses, 12 Months or More	3,010	1,461
Total Fair Value	150,399	115,154
Total Unrealized Losses	4,293	1,970
SECURITIES HELD TO MATURITY
Fair Value, Less than 12 Months	14,341	9,931
Unrealized Losses, Less than 12 Months	288	44
Fair Value, 12 Months or More	18,426	21,986
Unrealized Losses, 12 Months or More	462	293
Total Fair Value	32,767	31,917
Total Unrealized Losses	750	337
U.S. Government and agencies
SECURITIES AVAILABLE FOR SALE
Fair Value, Less than 12 Months	44,842	42,775
Unrealized Losses, Less than 12 Months	771	445
Fair Value, 12 Months or More	76,734	58,279
Unrealized Losses, 12 Months or More	2,747	1,373
Total Fair Value	121,576	101,054
Total Unrealized Losses	3,518	1,818
SECURITIES HELD TO MATURITY
Fair Value, Less than 12 Months	2,955	4,985
Unrealized Losses, Less than 12 Months	45	15
Fair Value, 12 Months or More	8,928	10,916
Unrealized Losses, 12 Months or More	72	84
Total Fair Value	11,883	15,901
Total Unrealized Losses	117	99
Mortgage-backed securities, residential
SECURITIES AVAILABLE FOR SALE
Fair Value, Less than 12 Months	20,998	7,228
Unrealized Losses, Less than 12 Months	493	56
Fair Value, 12 Months or More	4,517	2,845
Unrealized Losses, 12 Months or More	199	45
Total Fair Value	25,515	10,073
Total Unrealized Losses	692	101
SECURITIES HELD TO MATURITY
Fair Value, Less than 12 Months	11,386	4,946
Unrealized Losses, Less than 12 Months	243	29
Fair Value, 12 Months or More	9,498	11,070
Unrealized Losses, 12 Months or More	390	209
Total Fair Value	20,884	16,016
Total Unrealized Losses	633	238
State and municipal
SECURITIES AVAILABLE FOR SALE
Fair Value, Less than 12 Months	1,397	1,042
Unrealized Losses, Less than 12 Months	19	8
Fair Value, 12 Months or More	1,911	1,950
Unrealized Losses, 12 Months or More	64	34
Total Fair Value	3,308	2,992
Total Unrealized Losses	$ 83	42
CRA Mutual Fund
SECURITIES AVAILABLE FOR SALE
Fair Value, Less than 12 Months		0
Unrealized Losses, Less than 12 Months		0
Fair Value, 12 Months or More		1,035
Unrealized Losses, 12 Months or More		9
Total Fair Value		1,035
Total Unrealized Losses		$ 9

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