INTANGIBLE ASSETS - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 213,816	$ 213,778
Accumulated Amortization	(96,797)	(82,406)
Net Carrying Amount	117,019	131,372
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	174,940	174,894
Accumulated Amortization	(63,727)	(51,160)
Net Carrying Amount	111,213	123,734
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,466	5,433
Accumulated Amortization	(5,306)	(4,882)
Net Carrying Amount	160	551
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,724	24,753
Accumulated Amortization	(21,146)	(20,594)
Net Carrying Amount	3,578	4,159
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,838	7,847
Accumulated Amortization	(5,976)	(5,187)
Net Carrying Amount	1,862	2,660
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	848	851
Accumulated Amortization	(642)	(583)
Net Carrying Amount	$ 206	$ 268