Fixed Assets, Net (Tables)

9 Months Ended

Sep. 30, 2018

Property Plant And Equipment [Abstract]

Components of Fixed Assets, Net

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

	September 30, 2018			December 31, 2017
Computer and communications equipment	$	155,946		$	151,499
Software, including software development costs		201,119			164,011
Leasehold improvements and other fixed assets		200,485			179,178
		557,550			494,688
Less: accumulated depreciation and amortization		(341,419	)		(305,341	)
Fixed assets, net	$	216,131		$	189,347