Property And Equipment

12 Months Ended

Dec. 31, 2017

Property and Equipment

Property and equipment, stated at cost, at December 31, 2017 and 2016 consisted of the following (in thousands):



	2017			2016
Computers and related equipment	$	215,631		$	173,103
Furniture and equipment	2,035			1,928
Leasehold improvements	16,163			12,929
	233,829			187,960
Less: Accumulated depreciation and amortization	(154,056		)	(119,866		)
Total property and equipment, net	$	79,773		$	68,094

Depreciation and amortization expense was $33.0 million, $26.8 million and $19.2 million for the years ended December 31, 2017, 2016 and 2015, respectively.

Total disposals of long-lived assets for the years ended December 31, 2017, 2016 and 2015 was $4.0 million, zero and zero, respectively. The disposals during 2017 were primarily related to the sale of Cambridge, Web24, and Tea Leaves (see Note 5 - Assets Held for Sale).