Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The other noncash expense, not otherwise specified in the taxonomy, charged against earnings in the period to allocate the cost of tangible and intangible assets over their remaining economic lives.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
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PROPERTY AND EQUIPMENT, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property and equipment, net
Property and equipment, gross	$ 283,252	$ 189,874
Less: accumulated depreciation and amortization	(109,909)	(92,520)
Property and equipment, net	173,343	97,354
Total depreciation and amortization expense	30,200	27,000	$ 25,300
Land
Property and equipment, net
Property and equipment, gross	46,596	6,792
Leasehold improvements
Property and equipment, net
Property and equipment, gross	2,687	2,804
Furniture and fixtures
Property and equipment, net
Property and equipment, gross	3,635	3,551
Office and computer equipment
Property and equipment, net
Property and equipment, gross	11,701	11,080
Computer software
Property and equipment, net
Property and equipment, gross	3,274	2,530
Equipment
Property and equipment, net
Property and equipment, gross	114,230	93,465
Building
Property and equipment, net
Property and equipment, gross	69,547	39,848
Vehicles
Property and equipment, net
Property and equipment, gross	$ 31,582	$ 29,804