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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.