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INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets: |  |
Reserve for bad debts | $ 1,312 | $ 1,457
Accrued compensation | 4,297 | 4,803
Stock compensation | 13,877 | 10,041
Net operating losses | 20,555 | 26,349
Accrued reserve and other | 4,177 | 1,773
Lease liabilities | 36,472 | 0
Deferred rent | 0 | 5,928
Deferred gain on the sale of building | 0 | 4,140
Research and development credits | 6,341 | 6,331
Total deferred tax assets, prior to valuation allowance | 87,031 | 60,822
Valuation allowance | (13,553) | (14,246)
Total deferred tax assets, net of valuation allowance | 73,478 | 46,576
Deferred tax liabilities: |  |
Deferred commission costs, net | (22,612) | (19,314)
Lease right-of-use assets | (30,830) | 0
Prepaid expenses | (1,548) | (2,204)
Property and equipment, net | (8,891) | (5,367)
Intangible assets, net | (91,285) | (82,079)
Total deferred tax liabilities | (155,166) | (108,964)
Net deferred tax assets (liabilities) | $ (81,688) | $ (62,388)

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