Property, Equipment and Leasehold Improvements, Net

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Property, Equipment and Leasehold Improvements, Net

8. PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET

Property, equipment and leasehold improvements, net at December 31, 2021 and 2020 consisted of the following:

		As of
	Estimated	December 31,			December 31,
	Useful Lives	2021			2020
		(in thousands)
Computer & related equipment	2 to 5 years	$	179,557		$	186,786
Furniture & fixtures	7 years		14,194			15,276
Leasehold improvements	1 to 21 years		56,308			56,537
Work-in-process	—		2,699			2,996
Subtotal			252,758			261,595
Accumulated depreciation and amortization			(186,043	)		(181,149	)
Property, equipment and leasehold    improvements, net		$	66,715		$	80,446

Depreciation and amortization expense of property, equipment and leasehold improvements was $28.9 million, $29.8 million and $30.0 million for the years ended December 31, 2021, 2020 and 2019, respectively.