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INCOME TAXES Components of Net Deferred Tax Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax liabilities: |  |
Property and equipment | $ 111,411 | $ 116,178
Buy-in on maintenance contracts | 223 | 423
Total deferred tax liabilities | 111,634 | 116,601
Deferred tax assets: |  |
Tax loss carryforwards | 47,243 | 44,919
Stock compensation | 690 | 691
Reserves | 742 | 788
Other | 658 | (285)
Valuation allowance | (41,492) | (37,869)
Total deferred tax assets | 7,841 | 8,244
Net deferred tax liabilities | $ 103,793 | $ 108,357

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