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PROPERTY AND EQUIPMENT, NET | 9 Months Ended
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Sep. 30, 2018
PROPERTY AND EQUIPMENT, NET |
PROPERTY AND EQUIPMENT, NET | 8.PROPERTY AND EQUIPMENT, NET Property and equipment consist of the following at:
|  | September 30, 2018 |  | December 31, 2017 |
Land |  | $ | 44,261 |  | $ | 47,373 |
Leasehold improvements |  | 5,760 |  | 3,109 |
Furniture and fixtures |  | 6,925 |  | 6,461 |
Office and computer equipment |  | 18,384 |  | 14,506 |
Computer software |  | 3,103 |  | 3,650 |
Equipment |  | 176,732 |  | 148,434 |
Buildings |  | 113,625 |  | 107,374 |
Vehicles |  | 39,488 |  | 38,179 |
|  | 408,278 |  | 369,086 |
Less: accumulated depreciation and amortization |  | (165,424) |  | (138,810) |
|  | $ | 242,854 |  | $ | 230,276 |
Total depreciation and amortization expense recorded was $11.3 million and $9.4 million for the three-months ended September 30, 2018 and 2017, respectively. Total depreciation and amortization expense recorded was $33.5 million and $26.2 million for the nine-months ended September 30, 2018 and 2017, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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