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Income Taxes - Summary of Deferred Tax Asset and Liability (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax asset |  |  |
Basis difference of investments |  | $ 15,644 | $ 7,678
Deferred compensation |  | 74,030 | 65,794
Excess interest expense |  | 26,238 | 21,028
Other deferred and accrued expenses |  | 8,835 | 17,685
Net operating loss and credit carry-forwards |  | 84,822 | 73,072
Total deferred tax asset | [1] | 209,569 | 185,257
Valuation allowance |  | (81,191) | (71,931)
Deferred tax asset, net of valuation allowance |  | 128,378 | 113,326
Deferred tax liability |  |  |
Depreciation and amortization |  | 27,406 | 35,346
Total deferred tax liability | [1] | 27,406 | 35,346
Net deferred tax asset |  | $ 100,972 | $ 77,980
[1] | Before netting within tax jurisdictions.

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