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FAIR VALUES OF FINANCIAL INSTRUMENTS - Quantitative Information About Level 3 Fair Value Measurements (Details) $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
--- | --- | --- | --- | ---
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Mortgage servicing rights, at fair value | $ 1,157 | $ 1,770 | $ 31,852 | $ 76,121
Significant Unobservable Inputs (Level 3) |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Mortgage servicing rights, at fair value | 1,157 | 1,704 |  |
Recurring | Significant Unobservable Inputs (Level 3) |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Mortgage servicing rights, at fair value | 1,157 | 1,770 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Mortgage servicing rights, at fair value | $ 2,323 | $ 3,362 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted cash flow | Discount Rate | Minimum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Measurement input (percent) | 0.0875 | 0.0950 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted cash flow | Discount Rate | Maximum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Measurement input (percent) | 0.1300 | 0.1300 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted cash flow | Discount Rate | Weighted Average |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Measurement input (percent) | 0.1155 | 0.1127 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted cash flow | Prepayment Rate | Minimum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Measurement input (percent) | 0.0800 | 0.0800 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted cash flow | Prepayment Rate | Maximum |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Measurement input (percent) | 0.6634 | 0.6634 |  |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights | Discounted cash flow | Prepayment Rate | Weighted Average |  |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31) |  |  |  |
Measurement input (percent) | 0.1522 | 0.1267 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746 + Details
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- Definition Value of input used to measure servicing asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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