PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

Property and equipment are stated at cost, net of accumulated depreciation and amortization. All repairs and maintenance costs are expensed as incurred. Depreciation and amortization are calculated on a straight-line basis over the following estimated useful lives of the assets:

Leasehold improvements	Shorter of lease term or useful life
Furniture and office equipment	Five to ten years
Vehicles	Five to ten years
Computer hardware and software	Two to five years

Property and equipment consists of the following (in thousands):

	December 31,
	2015			2016
Leasehold improvements	$	49,752		$	53,073
Furniture, office equipment and vehicles	38,129			45,035
Computer hardware and software	56,656			64,577
Property and equipment, gross	144,537			162,685
Accumulated depreciation and amortization	(56,226		)	(75,117		)
Property and equipment, net	$	88,311		$	87,568