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Debt - Summary of Company's Total Outstanding Borrowings (Parenthetical) (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Line of credit facility, available borrowing capacity	$ 61.0	$ 61.0
Weighted average interest rate	4.53%	4.88%
Term Loans [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.375%	4.375%
Term Loans [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.125%	2.125%
Term Loans [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.25%	2.25%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.3125%	4.3125%
Revolving Credit Facility [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.0625%	2.0625%
Revolving Credit Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	2.25%	2.25%

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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X

- 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.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

Weighted average interest rate of long-term debt outstanding calculated over time.

+ References

No definition available.

+ Details

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- Details

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