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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2016
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
 
2016

 
2015

Computer software and hardware
 
1
to
7 years
 
$
57,277

 
$
46,207

Leasehold improvements
 
Up to term of lease
 
22,199

 
21,321

Transportation equipment
 
 

12 years
 
17,897

 
17,897

Office furniture and equipment
 
5
to
10 years
 
6,117

 
6,352

Total cost
 
 
 
 
 
103,490

 
91,777

Accumulated depreciation
 
 
 
 
 
(64,210
)
 
(56,034
)
Property and equipment, net
 
 
 
 
 
$
39,280

 
$
35,743