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Securities - Schedule of Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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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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