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INVESTMENT SECURITIES (Available-For-Sale Securities and Held-to-Maturity, Continuous Unrealized Loss Position, Fair Value) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | $ 134,172 | $ 112,803
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 1,153 | 1,616
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 34,837 | 9,208
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 742 | 367
Available-for-sale securities, continuous unrealized loss position, fair value | 169,009 | 122,011
Available-for-sale securities, continuous unrealized loss position, unrealized losses | 1,895 | 1,983
Equity [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value |  | 640
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses |  | 12
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 666 |
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 8 |
Available-for-sale securities, continuous unrealized loss position, fair value | 666 | 640
Available-for-sale securities, continuous unrealized loss position, unrealized losses | 8 | 12
U.S. Government Agencies [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 37,550 | 11,926
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 453 | 58
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 5,956 |
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 44 | 104
Available-for-sale securities, continuous unrealized loss position, fair value | 43,506 | 11,926
Available-for-sale securities, continuous unrealized loss position, unrealized losses | 497 | 162
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value |  | 2,115
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses |  | 78
Held-to-maturity securities, continuous unrealized loss position, fair value |  | 2,115
Held-to-maturity securities, continuous unrealized loss position, unrealized losses |  | 78
Mortgage-backed [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 96,622 | 100,237
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses | 700 | 1,546
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value | 28,215 | 9,208
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses | 690 | 263
Available-for-sale securities, continuous unrealized loss position, fair value | 124,837 | 109,445
Available-for-sale securities, continuous unrealized loss position, unrealized losses | $ 1,390 | $ 1,809

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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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