Fair Value Measurements - Carrying Amounts and Fair Values of Company's Amended and Restated Senior Credit Facilities and Contingent Consideration Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other long-term debt	$ 5,110	$ 5,953
Carrying Amount [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other long-term debt	5,110	5,953
Derivative instrument (liabilities) assets	(15,896)	60,524
Carrying Amount [Member] \| Amended and Restated Senior Credit Facility [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Secured	1,694,623	1,715,338
Carrying Amount [Member] \| 6.125% Senior Notes Due 2021 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	149,101	148,657
Carrying Amount [Member] \| 5.125% Senior Notes Due 2022 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	297,554	296,946
Carrying Amount [Member] \| 5.625% Senior Notes Due 2023 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	644,393	643,289
Carrying Amount [Member] \| 6.500% Senior Notes due 2024 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	384,141	383,304
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Other long-term debt	5,110	5,953
Derivative instrument (liabilities) assets	(15,896)	60,524
Fair Value [Member] \| Amended and Restated Senior Credit Facility [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Amended and Restated Senior Credit Facility	1,694,623	1,715,338
Fair Value [Member] \| 6.125% Senior Notes Due 2021 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	149,287	147,542
Fair Value [Member] \| 5.125% Senior Notes Due 2022 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	299,786	283,583
Fair Value [Member] \| 5.625% Senior Notes Due 2023 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	656,475	609,516
Fair Value [Member] \| 6.500% Senior Notes due 2024 [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Senior Notes	$ 399,507	$ 369,888

Derivative Assets (Liabilities), at Carrying Value, Net

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- Definition

Other long term debt fair value.

+ References

No definition available.

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
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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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No definition available.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

+ References

No definition available.

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- Definition

Fair value portion of notes payable.

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- Definition

Amount of long-term debt classified as other.

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- Definition

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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