Income Taxes - Reconciliation of Income Tax Expense Computed by Applying the United States Federal Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Computed “expected” tax expense	$ 167,117	$ 171,849	$ 251,508
Increase (decrease) in income taxes resulting from:
Effect of foreign taxes	26,599	16,445	(25,374)
State income taxes, net of Federal income tax benefit	11,885	8,682	12,525
Nondeductible executive compensation	2,838	3,126	0
Stock compensation expense, net	(2,689)	(3,860)	63
Enactment of 2017 Tax Act	0	0	(13,894)
Other, net	(1,972)	2,297	3,384
Income tax expense	$ 203,778	$ 198,539	$ 228,212