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BORROWINGS Repurchase Agreements (Details) - Maturity Overnight [Member] - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement | [1] | $ 162,679 | $ 176,913
U.S. Government agency securities |  |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement |  | 16,867 | 20,233
Agency mortgage-backed securities [Member] |  |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement |  | 51,273 | 79,079
Collateralized Mortgage Backed Securities [Member] |  |  |
Assets Sold under Agreements to Repurchase [Line Items] |  |  |
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement |  | $ 94,539 | $ 77,601
[1] | All customer repurchase agreements have an overnight and continuous maturity date.

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- Definition Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a financial asset repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same financial asset at a date certain for a specified price. Includes repurchase-to-maturity transactions and liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL34722452-111729 + Details
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