Property, Equipment and Leasehold Improvements (Tables)

6 Months Ended

Jun. 30, 2015

Property, Plant and Equipment [Abstract]

Schedule of Property, Equipment and Leasehold Improvements

Property, equipment and leasehold improvements at June 30, 2015 and December 31, 2014 consisted of the following:

		As of
Type	Estimated Useful Lives	June 30, 2015			December 31, 2014
		(in thousands)
Computer & related equipment	2 to 5 years	$	135,792		$	118,537
Furniture & fixtures	7 years		10,169			9,569
Leasehold improvements	1 to 21 years		49,804			49,756
Work-in-process	—		3,259			9,020
Subtotal			199,024			186,882
Accumulated depreciation and amortization			(105,731	)		(92,808	)
Property, equipment and leasehold improvements, net		$	93,293		$	94,074