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SECURITIES - Securities Available for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Amortized cost and estimated fair value of securities available for sale [Abstract] |  |
Amortized Cost | $ 257,751 | $ 297,947
Unrealized Gains | 84 | 514
Unrealized Losses | 11,362 | 5,370
Estimated Fair Value | 246,473 | 293,091
Amortized Cost [Abstract] |  |
Within one year | 16,284 |
After one, but within five years | 15,932 |
After five, but within ten years | 24,580 |
After ten years | 484 |
Total | 57,280 |
Amortized Cost | 257,751 | 297,947
Fair Value [Abstract] |  |
Within one year | 16,241 |
After one, but within five years | 15,728 |
After five, but within ten years | 23,831 |
After ten years | 448 |
Total | 56,248 |
Estimated Fair Value | 246,473 | 293,091
Obligations of U.S. Government and U.S. Government sponsored enterprises |  |
Amortized cost and estimated fair value of securities available for sale [Abstract] |  |
Amortized Cost | 10,487 | 15,492
Unrealized Gains | 8 | 20
Unrealized Losses | 42 | 21
Estimated Fair Value | 10,453 | 15,491
Amortized Cost [Abstract] |  |
Amortized Cost | 10,487 | 15,492
Fair Value [Abstract] |  |
Estimated Fair Value | 10,453 | 15,491
Mortgage-backed securities, residential |  |
Amortized cost and estimated fair value of securities available for sale [Abstract] |  |
Amortized Cost | 196,977 | 224,939
Unrealized Gains | 58 | 136
Unrealized Losses | 10,258 | 5,166
Estimated Fair Value | 186,777 | 219,909
Amortized Cost [Abstract] |  |
Without single maturity date | 196,977 |
Amortized Cost | 196,977 | 224,939
Fair Value [Abstract] |  |
Without single maturity date | 186,777 |
Estimated Fair Value | 186,777 | 219,909
Obligations of states and political subdivisions |  |
Amortized cost and estimated fair value of securities available for sale [Abstract] |  |
Amortized Cost | 46,544 | 52,928
Unrealized Gains | 17 | 355
Unrealized Losses | 1,016 | 151
Estimated Fair Value | 45,545 | 53,132
Amortized Cost [Abstract] |  |
Amortized Cost | 46,544 | 52,928
Fair Value [Abstract] |  |
Estimated Fair Value | 45,545 | 53,132
Corporate bonds and notes |  |
Amortized cost and estimated fair value of securities available for sale [Abstract] |  |
Amortized Cost | 249 | 249
Unrealized Gains | 1 | 2
Unrealized Losses | 0 | 0
Estimated Fair Value | 250 | 251
Amortized Cost [Abstract] |  |
Amortized Cost | 249 | 249
Fair Value [Abstract] |  |
Estimated Fair Value | 250 | 251
SBA loan pools |  |
Amortized cost and estimated fair value of securities available for sale [Abstract] |  |
Amortized Cost | 3,494 | 4,339
Unrealized Gains | 0 | 1
Unrealized Losses | 46 | 32
Estimated Fair Value | 3,448 | 4,308
Amortized Cost [Abstract] |  |
Without single maturity date | 3,494 |
Amortized Cost | 3,494 | 4,339
Fair Value [Abstract] |  |
Without single maturity date | 3,448 |
Estimated Fair Value | $ 3,448 | $ 4,308

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing after the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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