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GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets by Intangible Asset Type (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
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Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | $ 33,928 | $ 33,665
Less accumulated amortization | (26,456) | (25,969)
Intangible assets, net | 7,472 | 7,696
Covenants Not-to-Compete |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 17,624 | 17,594
Less accumulated amortization | (16,517) | (16,402)
Intangible assets, net | 1,107 | 1,192
Client Lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 16,304 | 16,071
Less accumulated amortization | (9,939) | (9,567)
Intangible assets, net | $ 6,365 | $ 6,504

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