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REVENUE (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | $ 278,421,000 | $ 184,101,000 | $ 540,811,000 | $ 365,136,000 |
Contract asset | 5,300,000 |  | 5,300,000 |  | $ 4,800,000
Contract liability | 800,000 |  | 800,000 |  | $ 400,000
Revenue recognized from prior period | 100,000 |  | 400,000 |  |
Estimated variable consideration, increase in revenue | 500,000 | 200,000 |  |  |
Mortgage products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 54,618,000 | 66,948,000 | 100,602,000 | 140,410,000 |
Credit Cards |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 56,045,000 | 38,747,000 | 110,551,000 | 84,879,000 |
Personal Loans |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 41,109,000 | 36,210,000 | 73,640,000 | 62,175,000 |
Insurance |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 71,941,000 | 13,000 | 139,033,000 | 26,000 |
Other Products And Services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | 54,708,000 | 42,183,000 | 116,985,000 | 77,646,000 |
Non-mortgage products |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenue | $ 223,803,000 | $ 117,153,000 | $ 440,209,000 | $ 224,726,000 |

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