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DISCONTINUED OPERATIONS (Details) |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 17, 2020 USD ($) | Jun. 11, 2020 USD ($) | Dec. 04, 2019 USD ($) | Jun. 21, 2019 USD ($) | Feb. 29, 2016 defendant | Jan. 31, 2016 USD ($) | Dec. 31, 2013 USD ($) network_lender claim | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) loan | Jul. 24, 2020 Rate | Jul. 21, 2019 USD ($) | May 31, 2017 Rate | Jun. 06, 2012 USD ($)
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  | $ 1,188,990,000 |  |  | $ 1,188,990,000 | $ 947,969,000 |  |  |  |  |
Damages sought |  |  |  |  |  |  | $ 61,000,000.0 |  |  |  |  |  |  |  |  |  |
2022 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  | 0.625% |  |  | 0.625% |  |  |  |  | 0.625% |
2025 Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  | 0.50% |  |  | 0.50% |  |  | 0.50% |  |  |
Discover Bank | Lending Tree Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset purchase agreement, proceeds from sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 55,900,000
Disposed of by means other than sale | Home Loan Center, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss from discontinued operations |  |  |  |  |  |  |  |  |  |  |  | 5,500,000 |  |  |  |  |
Gain on disposal |  |  |  |  |  |  |  |  |  |  | $ 0 | 4,515,000 | $ 0 |  |  |  |
Recognition of a liability |  |  |  |  |  |  |  |  |  |  |  | $ 10,000,000.0 |  |  |  |  |
Disposed of by means other than sale | Loan loss obligations | Lending Tree Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement payment |  |  |  |  |  |  |  |  | $ 36,000,000.0 |  |  |  |  |  |  |  |
Home Loan Center, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,200,000 |  |
Cash |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,900,000 |  |
Dividends |  |  |  |  |  | $ 40,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Pending Litigation | Disposed of by means other than sale | Loan loss obligations | Discontinued operations | Lending Tree Loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  |  |  |  |  |  |  | $ 36,000,000.0 |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of loan originators | network_lender |  |  |  |  |  |  | 80 |  |  |  |  |  |  |  |  |  |
Number of pending claims | claim |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Judicial Ruling |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  | $ 68,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Judicial Ruling | Damages |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  | 28,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Judicial Ruling | Pre-Verdict Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  | 14,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Judicial Ruling | Attorney Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  | 23,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Judicial Ruling | Pre-Judgment Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Residential Funding Co. v Home Loan Center | Settled Litigation | Damages | ResCap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party | $ 58,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Settlement payment |  |  |  |  |  |  |  | $ 6,400,000 | 26,500,000 |  |  |  |  |  |  |  |
Loss contingency receivable |  |  |  |  |  |  |  | $ 8,600,000 |  |  | $ 8,600,000 |  |  |  |  |  |
Lehman Brothers Holdings, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount awarded to other party |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |  |  |  |  |
Damages sought |  |  | $ 44,700,000 |  |  |  |  |  |  |  |  |  | $ 40,200,000 |  |  |  |
Number of loans sold with losses | loan |  |  |  |  |  |  |  |  |  |  |  |  | 370 |  |  |  |
Lehman Brothers Holdings, Inc. | Pending Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of defendants | defendant |  |  |  |  | 149 |  |  |  |  |  |  |  |  |  |  |  |
Lehman Brothers Holdings Inc. v. LendingTree, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DISCONTINUED OPERATIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Damages sought |  | $ 13,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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