Property and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

Components of Property and Equipment

Depreciation expense is computed using the straight-line method over the following useful lives:

Computer hardware	2 to 3 years
Computer software	2 to 5 years
Furniture and equipment	5 years
Leasehold improvements	Term of lease, 5 years maximum

Property and equipment consisted of the following (in thousands):

	December 31,
	2016			2015
Computer hardware	$	170,746		$	162,346
Computer software	374,490			339,634
Furniture and equipment	100,472			96,536
Leasehold improvements	133,541			118,491
Other	9,993			9,560
Property and equipment, cost	789,242			726,567
Accumulated depreciation	(627,733		)	(583,661		)
Property and equipment, net	$	161,509		$	142,906