Fixed Assets, Net (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Components of Fixed Assets, Net

Fixed assets, net consisted of the following (in thousands):

	December 31, 2015		December 31, 2014
Computer and communications equipment	$	142,511	$	151,808
Software, including software development costs		140,416		103,872
Leasehold improvements and other fixed assets		137,736		105,389
		420,663		361,069
Less: accumulated depreciation and amortization		274,790		249,049
Fixed assets, net	$	145,873	$	112,020