Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment consisted of the following as of December 31, 2015 and 2014 (dollars in thousands):

	December 31, 2015			December 31, 2014			Estimated Useful Life in Years
Computer and networking equipment	$	1,046,739		$	850,533		3-7
Purchased software	46,509			46,537			3-10
Furniture and fixtures	35,212			27,923			5
Office equipment	21,108			14,035			3-5
Leasehold improvements	119,466			92,544			1-16
Internal-use software	546,520			448,777			2-7
Property and equipment, gross	1,815,554			1,480,349
Accumulated depreciation and amortization	(1,062,374		)	(878,758		)
Property and equipment, net	$	753,180		$	601,591