(Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment consisted of the following as of December 31, 2013 and 2012 (dollars in thousands):

	December 31, 2013			December 31, 2012			Estimated Useful Life in Years
Computer and networking equipment	$	737,957		$	655,043		3-4
Purchased software	40,237			35,176			3
Furniture and fixtures	20,838			16,917			5
Office equipment	10,353			7,109			3
Leasehold improvements	64,471			44,539			2-12
Internal-use software	340,421			272,441			2-3
Property and equipment, gross	1,214,277			1,031,225
Accumulated depreciation and amortization	(763,990		)	(686,134		)
Property and equipment, net	$	450,287		$	345,091