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SECURITIES - Investment Securities Available for Sale in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Available-for-sale securities in a continuous unrealized loss position, fair value [Abstract] |  |
Less than 12 months | $ 117,756 | $ 123,007
12 months or longer | 135,840 | 131,436
Total | 253,596 | 254,443
Available-for-sale securities in a continuous unrealized loss position, unrealized losses [Abstract] |  |
Less than 12 months | 2,732 | 1,199
12 months or longer | 7,081 | 4,171
Total | 9,813 | 5,370
Obligations of U.S. Government and U.S. Government sponsored enterprises |  |
Available-for-sale securities in a continuous unrealized loss position, fair value [Abstract] |  |
Less than 12 months | 14,948 | 14,982
12 months or longer | 0 | 0
Total | 14,948 | 14,982
Available-for-sale securities in a continuous unrealized loss position, unrealized losses [Abstract] |  |
Less than 12 months | 50 | 21
12 months or longer | 0 | 0
Total | 50 | 21
Mortgage-backed securities, residential |  |
Available-for-sale securities in a continuous unrealized loss position, fair value [Abstract] |  |
Less than 12 months | 65,746 | 83,562
12 months or longer | 130,586 | 131,165
Total | 196,332 | 214,727
Available-for-sale securities in a continuous unrealized loss position, unrealized losses [Abstract] |  |
Less than 12 months | 2,193 | 1,013
12 months or longer | 6,944 | 4,153
Total | 9,137 | 5,166
Obligations of states and political subdivisions |  |
Available-for-sale securities in a continuous unrealized loss position, fair value [Abstract] |  |
Less than 12 months | 36,819 | 20,526
12 months or longer | 1,709 | 271
Total | 38,528 | 20,797
Available-for-sale securities in a continuous unrealized loss position, unrealized losses [Abstract] |  |
Less than 12 months | 488 | 133
12 months or longer | 94 | 18
Total | 582 | 151
SBA loan pools |  |
Available-for-sale securities in a continuous unrealized loss position, fair value [Abstract] |  |
Less than 12 months | 243 | 3,937
12 months or longer | 3,545 | 0
Total | 3,788 | 3,937
Available-for-sale securities in a continuous unrealized loss position, unrealized losses [Abstract] |  |
Less than 12 months | 1 | 32
12 months or longer | 43 | 0
Total | $ 44 | $ 32

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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