Debt - Covenants (Detail) - Revolving Credit Facility [Member] $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Debt
Threshold aggregate consideration on acquisition	$ 200
Increased leverage ratio on achievement of acquisition	4.25
Maximum [Member]
Debt
Debt to EBITDA ratio	3.75

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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