Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2014

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment consisted of the following as of December 31, 2014 and 2013 (dollars in thousands):

	December 31, 2014			December 31, 2013			Estimated Useful Life in Years
Computer and networking equipment	$	850,533		$	737,957		3-4
Purchased software	46,537			40,237			3
Furniture and fixtures	27,923			20,838			5
Office equipment	14,035			10,353			3
Leasehold improvements	92,544			64,471			2-12
Internal-use software	448,777			340,421			2-7
Property and equipment, gross	1,480,349			1,214,277
Accumulated depreciation and amortization	(878,758		)	(763,990		)
Property and equipment, net	$	601,591		$	450,287