Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Components of Property and Equipment

The components of property and equipment are:

	December 31,
	2018			2017
	(in thousands)
Land and land improvements	$	2,197		$	3,107
Construction in progress and software under development	49,920			13,243
Computer equipment and software	180,364			159,786
Buildings and leasehold improvements	30,019			37,764
Furniture, fixtures, vehicles and equipment	28,937			18,002
Assets under capital lease	4,827			4,827
	296,264			236,729
Less: Accumulated depreciation and amortization	(168,729		)	(153,355		)
Property and equipment, at cost, net	$	127,535		$	83,374

Schedule of Estimated Useful Lives

A summary of the ranges of estimated useful lives upon which depreciation rates are based follows:

Computer equipment and software	2-7 years
Buildings and leasehold improvements	10-40 years
Furniture, fixtures, vehicles and equipment	3-10 years
Assets under capital leases	3-8 years