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Segment Information (Tables)
3 Months Ended
Mar. 31, 2021
Segment Reporting [Abstract]  
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

Three Months Ended

March 31, 

    

2021

    

2020

Revenues

 

  

 

  

Truckload

$

368,920

$

382,092

Brokerage

 

81,840

 

50,476

Total Operating Revenue

$

450,760

$

432,568

Operating Income

 

  

 

  

Truckload

$

6,728

$

1,200

Brokerage

 

1,270

 

(4,868)

Total Operating Income (Loss)

$

7,998

$

(3,668)