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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Income Taxes (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2018
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
State tax expense | $ 3,682,000 | $ 4,147,000 | $ 3,772,000 |
Current tax benefit (provision) | (485,000) | (1,354,000) | 6,459,000 |
Deferred tax benefit (provision) | (2,668,000) | 2,905,000 | (4,526,000) |
Income tax benefit (provision) | (3,153,000) | 1,551,000 | $ 1,933,000 |
Net deferred tax asset | $ 15,117,000 | $ 20,133,000 |  |
Accounting Standards Update 2016-16 |  |  |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Cumulative effect of accounting change |  |  |  | $ 11,433,000

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