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GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets by Intangible Asset Type (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Intangible assets $ 98,600 $ 97,284
Less accumulated amortization (40,657) (38,563)
Intangible assets, net 57,943 58,721
Covenants Not-to-Compete    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 26,467 26,162
Less accumulated amortization (19,365) (18,968)
Intangible assets, net 7,102 7,194
Client Lists    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets 72,133 71,122
Less accumulated amortization (21,292) (19,595)
Intangible assets, net $ 50,841 $ 51,527