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LOANS HELD FOR SALE - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Sep. 30, 2018 | Sep. 30, 2017
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 |  |  | $ 2,179 | $ 10,289
Nonperforming Financing Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 |  |  | 74,400 |
Fair value write-downs |  |  | 22,200 |
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Nonperforming Financing Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 |  |  | 39,600 |
Fair value write-downs |  |  | 13,800 |
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] | Nonperforming Financing Receivable [Member] | Loans held for sale sold [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 |  | $ 27,200 |  |
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] | Nonperforming Financing Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 |  |  | 1,800 |
Fair value write-downs |  |  | 1,700 |
Construction Loans [Member] | Nonperforming Financing Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 |  |  | 33,000 |
Fair value write-downs |  |  | $ 6,700 |
Construction Loans [Member] | Nonperforming Financing Receivable [Member] | Loans held for sale sold [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Transfer Of Loans Held For Sale To Portfolio Loans 1 | $ 7,700 |  |  |

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- Definition Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228 + Details
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- Definition Value of loans held-for-sale transferred to loans held in the entity's portfolio in noncash transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 + Details
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