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FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS (Narrative) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Debt Disclosure [Abstract] |  |
Advances from Federal Home Loan Banks | $ 108,000 | $ 37,900
FHLB interest rate | 3.17% | 2.20%
Advances with fixed maturity dates | $ 108,000 | $ 28,900
Weighted average interest rate on fixed maturity advances | 3.17% | 1.96%
Residential mortgages pledged as collateral for advances | $ 496,100 | $ 1,000,000
Multifamily mortgage loans pledged as collateral for advances | 550,000 | 1,100,000
Investment pledges against advances | 58,500 | 13,500
Callable variable rate advances |  | $ 9,000
Weighted average interest rate on variable advances (in percent) |  | 2.95%
Overnight borrowings of debt | 0 | $ 0
Unused commitments from FHLB | 1,300,000 |
Unused short-term or overnight borrowings from correspondent banks | 22,000 |
Unused short-term or overnight borrowings from FRB | $ 1,300,000 |

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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