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MORTGAGE BANKING - Economic Assumptions Used to Estimate Value of MSRs Capitalized (Details) - Residential mortgages | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Servicing Assets at Fair Value [Line Items] |  |  |  |
Weighted average life (in years) | 7 years 3 months 4 days | 6 years 2 months 12 days | 7 years 5 months 1 day | 6 years 7 months 6 days
Weighted average constant prepayment rate | 7.60% | 11.10% | 7.50% | 9.90%
Weighted average discount rate | 9.80% | 9.90% | 9.80% | 9.90%

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- Definition Servicing assets and servicing liabilities capitalized during period at fair value, assumptions used to estimate fair value, prepayment speed + References No definition available. + Details
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- Definition Servicing assets and servicing liabilities capitalized during the period at fair value, assumptions used to estimate fair value, discount rate + References No definition available. + Details
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- Definition Servicing assets and servicing liabilities capitalized during the period at fair value, assumptions used to estimate fair value, weighted average life + References No definition available. + Details
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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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- Details
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