Long-term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Aug. 19, 2020	Feb. 06, 2020	Jan. 28, 2016
Debt Instrument [Line Items]
Debt	$ 2,880,369	$ 2,926,633
Debt, Less current maturities	(155,372)	(122,879)
Debt, excluding current maturities	2,724,997	2,803,754
Deferred financing costs	40,245	40,117
Deferred financing costs, Less current maturities	(333)	(445)
Deferred financing costs, excluding current maturities	39,912	39,672
Debt, net of deferred financing costs	2,840,124	2,886,516
Debt, net of deferred financing costs, Less current maturities	(155,039)	(122,434)
Debt, net of deferred financing costs, excluding current maturities	2,685,085	2,764,082
Senior Credit Facility [Member]
Debt Instrument [Line Items]
Debt	623,529	598,466
Deferred financing costs	11,003	11,569
Debt, net of deferred financing costs	612,526	586,897
Accounts Receivable Securitization Program [Member]
Debt Instrument [Line Items]
Debt	155,000	122,500
Deferred financing costs	333	445
Debt, net of deferred financing costs	154,667	122,055
3 3/4% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	600,000	600,000
Deferred financing costs	7,786	8,031
Debt, net of deferred financing costs	$ 592,214	$ 591,969
Debt Instrument, Interest Rate, Stated Percentage	3.75%	3.75%		3.75%
3 5/8% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	$ 550,000
Deferred financing costs	7,941
Debt, net of deferred financing costs	$ 542,059
Debt Instrument, Interest Rate, Stated Percentage	3.625%
4 7/8% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	$ 400,000	$ 400,000
Deferred financing costs	5,446	5,586
Debt, net of deferred financing costs	$ 394,554	$ 394,414
Debt Instrument, Interest Rate, Stated Percentage	4.875%	4.875%
5 3/4% Senior Notes [Member]
Debt Instrument [Line Items]
Debt		$ 653,631
Deferred financing costs		6,575
Debt, net of deferred financing costs		$ 647,056
Debt Instrument, Interest Rate, Stated Percentage		5.75%			5.75%
Other Notes with Various Rates and Terms [Member]
Debt Instrument [Line Items]
Debt	$ 2,541	$ 2,756
Deferred financing costs	0	0
Debt, net of deferred financing costs	2,541	2,756
4% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	549,299	549,280
Deferred financing costs	7,736	7,911
Debt, net of deferred financing costs	$ 541,563	$ 541,369
Debt Instrument, Interest Rate, Stated Percentage	4.00%	4.00%	4.00%	4.00%