Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Accounts receivable, principally due to the allowance for doubtful accounts	$ 9,586	$ 8,518
Accrued expenses not currently deductible for tax	2,305	6,734
Lease deferral	24,713	0
Interest rate swap	13,781	0
Stock based compensation	39,779	40,081
Income tax credits	35,845	26,770
Net operating loss carry forwards	67,108	53,221
Investments	0	39,062
Accrued escheat	3,098	3,608
Other	3,522	4,240
Deferred tax assets before valuation allowance	199,737	182,234
Valuation allowance	(64,482)	(90,366)
Deferred tax assets, net	135,255	91,868
Deferred tax liabilities:
Intangibles—including goodwill	(499,525)	(483,361)
Basis difference in investment in subsidiaries	(42,314)	(38,200)
Lease deferral	(21,810)	0
Mark to Market	(3,213)	0
Accrued Expense Liability	(4,023)	0
Prepaid expenses	(2,075)
Property and equipment, prepaid expenses and other	(79,620)	(59,101)
Deferred tax liabilities	(652,580)	(580,662)
Net deferred tax liabilities	$ (517,325)	$ (488,794)