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Income Taxes - Temporary Tax Effects (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Bonus and deferred compensation | $ 276,572 | $ 208,198
Net operating losses (NOLs) and state tax credits | 275,574 | 283,353
Bad debt and other reserves | 57,506 | 56,313
Pension obligation | 22,950 | 22,148
Investments | 5,211 | 5,573
Tax effect on revenue items related to new revenue recognition guidance | (38,510) | (55,306)
Property and equipment | (49,935) | (40,024)
Unconsolidated affiliates and partnerships | (64,448) | 6,267
Capitalized costs and intangibles | (289,674) | (256,087)
All other | (2,457) | (1,441)
Net deferred tax assets before valuation allowance | 192,789 | 228,994
Valuation allowance | (248,511) | (277,466)
Net deferred tax (liabilities) | $ (55,722) | $ (48,472)

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