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SALES OF SUBSIDIARY AND BUSINESS UNITS - Summary of net gain on disposal of discontinued operations (Details) - 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
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Net cash proceeds |  |  |  |  | $ 56,076 | $ 0 |
Book value of MSRs sold |  | $ 0 |  | $ 0 | (39,186) | (3) |
Net gain on disposal |  |  |  |  | 13,749 | 0 |
Banc Home Loan | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from the transaction |  |  |  |  | 63,054 |  |
Compensation expense related to the transaction |  |  |  |  | (3,500) |  |
Other transaction costs |  |  |  |  | (3,478) |  |
Net cash proceeds |  |  |  |  | 56,076 |  |
Book value of certain assets sold | $ (2,500) | (2,455) |  |  | (2,455) |  |
Book value of MSRs sold | (37,800) |  | $ (37,800) |  | (37,772) |  |
Goodwill |  | 0 |  |  | 0 |  | $ (2,100)
Net gain on disposal | $ 13,700 | $ 211 |  | $ 0 | $ 13,749 | $ 0 |

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- Definition Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 + Details
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