Goodwill and Intangible Assets - Classes of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Total cost of intangibles		$ 156,818	$ 156,424
Accumulated Amortization		30,997	29,784
Finite-lived intangibles, net		112,374
Intangible assets, net		125,821	126,640
Trade Name - Indefinite-lived
Finite-Lived Intangible Assets [Line Items]
Trade Name - Indefinite-lived		13,447	13,447
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Cost		143,371	139,271
Accumulated Amortization		30,997	26,078
Finite-lived intangibles, net		$ 112,374	113,193
Trade Name - Indefinite-lived
Finite-Lived Intangible Assets [Line Items]
Cost			3,679
Accumulated Amortization			3,679
Finite-lived intangibles, net			0
Non-Compete Agreement
Finite-Lived Intangible Assets [Line Items]
Amortization Period	24 months
Cost			27
Accumulated Amortization			27
Finite-lived intangibles, net			$ 0
Minimum | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period		84 months
Minimum | Trade Name - Indefinite-lived
Finite-Lived Intangible Assets [Line Items]
Amortization Period	12 months
Maximum | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	180 months	180 months
Maximum | Trade Name - Indefinite-lived
Finite-Lived Intangible Assets [Line Items]
Amortization Period	24 months