Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Components of Property and Equipment

Components of property and equipment consisted of the following:

	December 31, 2019			March 31, 2020
				(unaudited)
	(in thousands)
Land	$	790		$	790
Building	8,285			8,285
Software	109,546			118,579
Computers and office equipment	187,056			198,338
Furniture and fixtures	18,918			18,926
Leasehold improvements	20,469			20,497
Construction in process	5,850			4,140
Property and equipment—at cost	350,914			369,555
Less: accumulated depreciation	(264,989		)	(277,371		)
Property and equipment—net	$	85,925		$	92,184