Long-term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt	$ 3,590,472	$ 3,004,532
Debt, Less current maturities	(175,828)	(232,595)
Debt, excluding current maturities	3,414,644	2,771,937
Deferred financing costs	38,663	24,414
Deferred financing costs, Less current maturities	(6,212)	(6,081)
Deferred financing costs, excluding current maturities	32,451	18,333
Debt, net of deferred financing costs	3,551,809	2,980,118
Debt, net of deferred financing costs, Less current maturities	(169,616)	(226,514)
Long-term debt, net of deferred financing costs	3,382,193	2,753,604
Senior Credit Facility [Member]
Debt Instrument [Line Items]
Debt	1,223,276	1,127,069
Deferred financing costs	13,250	9,077
Debt, net of deferred financing costs	1,210,026	1,117,992
5% Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt	535,000	535,000
Deferred financing costs	3,013	3,237
Debt, net of deferred financing costs	531,987	531,763
Accounts Receivable Securitization Program [Member]
Debt Instrument [Line Items]
Debt	175,000	175,000
Deferred financing costs	740	846
Debt, net of deferred financing costs	174,260	174,154
5 3/4% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	654,167	654,345
Deferred financing costs	7,466	7,752
Debt, net of deferred financing costs	646,701	646,593
3 3/4% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	600,000
Deferred financing costs	8,466
Debt, net of deferred financing costs	591,534
Other Notes with Various Rates and Terms [Member]
Debt Instrument [Line Items]
Debt	3,029	3,118
Debt, net of deferred financing costs	3,029	3,118
4% Senior Notes [Member]
Debt Instrument [Line Items]
Debt	400,000
Deferred financing costs	5,728
Debt, net of deferred financing costs	$ 394,272
5 3/8% Senior Notes [Member]
Debt Instrument [Line Items]
Debt		510,000
Deferred financing costs		3,502
Debt, net of deferred financing costs		$ 506,498