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SERVICING RIGHTS - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 30, 2017 | Sep. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Transfers and Servicing [Abstract] |  |  |  |  |  |  |
Unpaid principal balance |  | $ 4,220,000 |  |  | $ 4,220,000 |  | $ 7,580,000
Escrow balances |  | 33,600 |  |  | 33,600 |  | $ 34,200
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
MSRs sold |  | $ 0 |  | $ 0 | $ 39,186 | $ 3 |
Discount rate |  |  |  |  | 8.25% |  |
Prepayment speed calculation percentage |  |  |  |  | 8.25% |  |
Banc Home Loan | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
MSRs sold | $ 37,800 |  | $ 37,800 |  | $ 37,772 |  |

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- Definition Continuing Involvement with Derecognized Transferred Financial Assets, Recorded Escrow Balance + References No definition available. + Details
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- Definition Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that have been derecognized. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=d3e107314-111719 + Details
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- Definition Decrease in servicing assets subsequently measured at fair value resulting from conveyance of servicing rights to unrelated parties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746 + Details
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- Details
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- Details
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