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GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets by Intangible Asset Type (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Intangible assets $ 103,287 $ 97,284
Less accumulated amortization (42,879) (38,563)
Intangible assets, net 60,408 58,721
Covenants Not-to-Compete    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 26,652 26,162
Less accumulated amortization (19,756) (18,968)
Intangible assets, net 6,896 7,194
Client Lists    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 76,635 71,122
Less accumulated amortization (23,123) (19,595)
Intangible assets, net $ 53,512 $ 51,527