Long-term Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Senior notes	$ 4,500,000	$ 4,500,000
Acquisition obligations and other notes payable	139,371	117,547
Capital lease obligations	305,643	299,682
Total debt principal outstanding	9,165,014	9,192,229
Discount and deferred financing costs	(71,877)	(79,861)
Carrying Amount of Long-Term Debt, Net of Unamortized Discount or Premium, Current and Noncurrent, Total	9,093,137	9,112,368
Less current portion	(182,323)	(165,041)
Long-term debt	8,910,814	8,947,327
Term Loan A
Debt Instrument [Line Items]
Senior Secured Credit Facilities	825,000	862,500
Term Loan B
Debt Instrument [Line Items]
Senior Secured Credit Facilities	$ 3,395,000	$ 3,412,500

This represents deferred purchase price obligations associated with acquisitions as well as other notes payable.

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Discount and deferred finance costs.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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Amount of long-term debt and capital lease obligations including current maturities.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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