Fixed Assets, Net (Tables)

6 Months Ended

Jun. 30, 2018

Property Plant And Equipment [Abstract]

Components of Fixed Assets, Net

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

	June 30, 2018			December 31, 2017
Computer and communications equipment	$	155,283		$	151,499
Software, including software development costs		187,072			164,011
Leasehold improvements and other fixed assets		197,270			179,178
		539,625			494,688
Less: accumulated depreciation and amortization		(329,163	)		(305,341	)
Fixed assets, net	$	210,462		$	189,347