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Long-term Debt - Schedule of Maturities of Long Term Debt (Detail)	9 Months Ended
	Sep. 30, 2019 USD ($)
December 31, 2019-June 30, 2020 [Member] | Term A [Member]
Debt Instrument [Line Items]
Principal payment amount	$ 8,437,500
December 31, 2019-June 30, 2020 [Member] | Term B [Member]
Debt Instrument [Line Items]
Principal payment amount	1,500,000.0
September 30, 2020-March 31, 2022 [Member] | Term A [Member]
Debt Instrument [Line Items]
Principal payment amount	16,875,000.0
September 30, 2020-March 31, 2022 [Member] | Term B [Member]
Debt Instrument [Line Items]
Principal payment amount	1,500,000.0
Term A Loan Maturity May 15, 2022 [Member] | Term A [Member]
Debt Instrument [Line Items]
Principal payment amount	253,125,000.0
June 30, 2022-December 31, 2024 [Member] | Term B [Member]
Debt Instrument [Line Items]
Principal payment amount	1,500,000.0
Term B Loan Maturity March 16, 2025 [Member] | Term B [Member]
Debt Instrument [Line Items]
Principal payment amount	$ 559,500,000.0

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- Definition

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.

+ References

No definition available.

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- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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