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RESERVE FOR LOSS ON REPURCHASED LOANS - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2018
Representations and Warranties Obligations and Corporate Guarantees |  |
Loss Contingencies [Line Items] |  |
Decrease in reserve for loss on repurchased loans | $ 277 | $ 3,200
Portfolio Run-Off and Repurchase Settlement Activities |  |
Loss Contingencies [Line Items] |  |
Decrease in reserve for loss on repurchased loans |  | 1,400
Methodology and Data Enhancements |  |
Loss Contingencies [Line Items] |  |
Decrease in reserve for loss on repurchased loans |  | $ 1,700

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- Definition Amount of increase (decrease) in loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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