PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

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

	December 31,
	2012			2013
Leasehold improvements	$	28,527		$	36,933
Furniture, office equipment and research vehicles	25,837			27,395
Computer hardware and software	36,688			36,391
	91,052			100,719
Accumulated depreciation and amortization	(44,744		)	(43,000		)
Property and equipment, net	$	46,308		$	57,719