Fixed Assets, Net (Tables)

9 Months Ended

Sep. 30, 2017

Property Plant And Equipment [Abstract]

Components of Fixed Assets, Net

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

	September 30, 2017			December 31, 2016
Computer and communications equipment	$	149,896		$	133,470
Software, including software development costs		155,752			130,397
Leasehold improvements and other fixed assets		174,756			154,602
		480,404			418,469
Less: accumulated depreciation and amortization		(294,800	)		(251,230	)
Fixed assets, net	$	185,604		$	167,239