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GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Assets by Intangible Asset Type (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
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Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | $ 33,665 | $ 33,331
Less accumulated amortization | (25,433) | (24,079)
Intangible assets, net | 8,232 | 9,252
Covenants Not-to-Compete |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 17,594 | 17,266
Less accumulated amortization | (16,288) | (16,198)
Intangible assets, net | 1,306 | 1,068
Client Lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets | 16,071 | 16,065
Less accumulated amortization | (9,145) | (7,881)
Intangible assets, net | $ 6,926 | $ 8,184

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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