Goodwill and Other Intangible Assets, Net - Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Definite life, Accumulated Amortization	$ (20,676)	$ (15,251)
Definite life, Weighted- Average Remaining Life (Years)	1 year 1 month 6 days	1 year 2 months 12 days
Below market leases, Gross Amount	$ 941	$ 941
Below market leases, Accumulated Amortization	(114)	(45)
Below market leases, Net Carrying Amount	$ 827	$ 896
Below market leases, Weighted-Average Remaining Life (Years)	7 months 6 days	6 months
Gross Amount	$ 53,096	$ 51,020
Net Carrying Amount	32,420	35,769
Trademark and Trade Names [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Definite life, Gross Amount	10,152	9,316
Definite life, Accumulated Amortization	(8,923)	(6,706)
Definite life, Net Carrying Amount	$ 1,229	$ 2,610
Definite life, Weighted- Average Remaining Life (Years)	6 months	6 months
Non-contractual Customers [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Definite life, Gross Amount	$ 11,325	$ 11,323
Definite life, Accumulated Amortization	(5,402)	(3,890)
Definite life, Net Carrying Amount	$ 5,923	$ 7,433
Definite life, Weighted- Average Remaining Life (Years)	1 year 6 months	1 year 9 months 18 days
License Agreements (GSE) [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Definite life, Gross Amount	$ 4,981	$ 4,981
Definite life, Accumulated Amortization	(2,958)	(2,292)
Definite life, Net Carrying Amount	$ 2,023	$ 2,689
Definite life, Weighted- Average Remaining Life (Years)	3 months 18 days	4 months 24 days
Non-compete Agreements [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Definite life, Gross Amount	$ 6,474	$ 6,267
Definite life, Accumulated Amortization	(2,193)	(1,469)
Definite life, Net Carrying Amount	$ 4,281	$ 4,798
Definite life, Weighted- Average Remaining Life (Years)	1 year 3 months 18 days	1 year 4 months 24 days
Contractual Customers [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Definite life, Gross Amount	$ 2,483	$ 1,452
Definite life, Accumulated Amortization	(1,086)	(849)
Definite life, Net Carrying Amount	$ 1,397	$ 603
Definite life, Weighted- Average Remaining Life (Years)	1 month 6 days	1 month 6 days
Trademark and Trade Names [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Indefinite life, intangible assets	$ 11,350	$ 11,350
License Agreements (GSE) [Member]
Schedule of Acquired Finite And Indefinite Lived Intangible Asset By Major Class [Line Items]
Indefinite life, intangible assets	$ 5,390	$ 5,390