Goodwill and Other Intangibles, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 30, 2018
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment loss	$ 0	$ 0	$ 0
Disposal related to goodwill associated with closure of underperforming locations	600,000	1,500,000
Disposal related to intangible assets	3,700,000			$ 3,700,000
Total intangible assets, Net total	297,379,000	134,610,000
Amortization expense	$ 2,100,000	$ 2,100,000	$ 2,500,000
Trade name
Indefinite-lived Intangible Assets [Line Items]
Intangible asset estimated useful life	8 years 9 months 18 days	10 years 3 months 18 days
Customer Relationships
Indefinite-lived Intangible Assets [Line Items]
Intangible asset estimated useful life	19 years 3 months 18 days
Non-compete
Indefinite-lived Intangible Assets [Line Items]
Intangible asset estimated useful life	2 years 9 months 18 days	2 years 1 month 6 days