Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Components Of Property and Equipment

Property and equipment consists of the following:

		December 31,
(in thousands)	Estimated Useful Lives	2017			2016
Equipment	1-10 years	$	88,189		$	78,614
Computer software	1-5 years	34,994			30,867
Buildings and improvements	5-40 years	26,423			25,472
Leasehold improvements	1-16 years	13,316			11,571
Furniture	1-13 years	9,239			8,618
Land		1,759			1,759
Property and equipment, gross		173,920			156,901
Less: Accumulated depreciation		(116,824		)	(102,224		)
Property and equipment, net		$	57,096		$	54,677