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Related Party (Tables)
 9 Months Ended
Sep. 30, 2018
Related Party [Abstract]  
Schedule of Related Party Transactions [Table Text Block]
The related payments (receipts) with related parties for the three and nine months ended September 30, 2018 and 2017 (in thousands) were as follows:

 
Three months ended September 30,
 
2018
 
2017
Payments for parts and services
$
65

 
$
172

Terminal lease payments
251

 
421

 
$
316

 
$
593


 
Nine months ended September 30,
 
2018
 
2017
Receipts for trailer sales
$
—

 
$
(12
)
Payments for parts and services
346

 
409

Terminal lease payments
712

 
1,227

 
$
1,058

 
$
1,624