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INCOME TAXES (Deferred) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred tax assets: |  |
Accrued expenses | $ 41,757 | $ 39,885
Operating lease liabilities | 19,726 |
Pension liabilities |  | 1,721
Supplemental pension liabilities | 1,091 | 1,033
Multiemployer pension fund withdrawal | 5,546 | 5,710
Postretirement liabilities other than pensions | 5,359 | 7,660
Share-based compensation | 5,605 | 4,893
Federal and state net operating loss carryforwards | 1,093 | 1,152
Other | 1,538 | 1,355
Total deferred tax assets | 81,715 | 63,409
Valuation allowance | (668) | (53)
Total deferred tax assets, net of valuation allowance | 81,047 | 63,356
Deferred tax liabilities: |  |
Amortization, depreciation, and basis differences for property, plant and equipment, and other long-lived assets | 107,835 | 93,525
Operating lease right-of-use assets | 18,703 |
Intangibles | 7,373 | 14,066
Revenue recognition | 669 | 1,513
Prepaid expenses | 4,952 | 3,225
Total deferred tax liabilities | 139,532 | 112,329
Net deferred tax liabilities | $ (58,485) | $ (48,973)

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