Property, Equipment and Leasehold Improvements

9 Months Ended

Sep. 30, 2016

Property Plant And Equipment [Abstract]

Property, Equipment and Leasehold Improvements

4. PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS

Property, equipment and leasehold improvements at September 30, 2016 and December 31, 2015 consisted of the following:

	As of
	September 30,			December 31,
	2016			2015
	(in thousands)
Computer & related equipment	$	160,946		$	143,499
Furniture & fixtures		10,134			9,870
Leasehold improvements		47,924			47,579
Work-in-process		13,492			12,658
Subtotal		232,496			213,606
Accumulated depreciation and amortization		(133,237	)		(114,680	)
Property, equipment and leasehold improvements, net	$	99,259		$	98,926

Depreciation and amortization expense of property, equipment and leasehold improvements was $8.3 million and $8.0 million for the three months ended September 30, 2016 and 2015, respectively. Depreciation and amortization expense of property, equipment and leasehold improvements was $24.9 million and $23.3 million for the nine months ended September 30, 2016 and 2015, respectively.