Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and equipment [Table Text Block]

Property and equipment consisted of the following at December 31:

in thousands	Estimated Useful Life			2017			2016
Computer software and hardware	1	to	10 years	$	62,303		$	57,277
Leasehold improvements	Up to term of lease			21,975			22,199
Transportation equipment	3	to	12 years	17,851			17,897
Office furniture and equipment	4	to	15 years	6,102			6,117
Total cost				108,231			103,490
Accumulated depreciation				(70,561		)	(64,210		)
Property and equipment, net				$	37,670		$	39,280