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Goodwill And Intangible Assets (Tables)
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
Schedule Of Changes In Gross Carrying Amounts Of Goodwill
(Dollars in thousands)
Logistics
 
Truckload
 
Corporate and Eliminations
 
Total
Balance at December 31, 2011
 
 
 
 
 
 
 
Goodwill
$
55,440

 
$
464,598

 
$
727

 
$
520,765

Accumulated impairment losses
(48,236
)
 
(134,813
)
 
—

 
(183,049
)
 
7,204

 
329,785

 
727

 
337,716

 
 
 
 
 
 
 
 
Change in foreign currency exchange rates
448

 
—

 
—

 
448

Balances at December 31, 2012
 

 
 

 
 

 
 

Goodwill
55,888

 
464,598

 
727

 
521,213

Accumulated impairment losses
(48,236
)
 
(134,813
)
 
—

 
(183,049
)
 
7,652

 
329,785

 
727

 
338,164

 
 
 
 
 
 
 
 
Change in foreign currency exchange rates
(135
)
 
—

 
—

 
(135
)
Balances at March 31, 2013
 

 
 

 
 

 
 

Goodwill
55,753

 
464,598

 
727

 
521,078

Accumulated impairment losses
(48,236
)
 
(134,813
)
 
—

 
(183,049
)
 
$
7,517

 
$
329,785

 
$
727

 
$
338,029

  
Schedule Of Intangible Assets
 
March 31, 2013
 
December 31, 2012
(Dollars in thousands)
Gross Carrying Amount
 
Accumulated Amortization
 
Gross Carrying Amount
 
Accumulated Amortization
Customer relationships
$
23,088

 
$
12,680

 
$
23,088

 
$
12,091

  
Schedule Of Estimated Amortization Expense  
(Dollars in thousands)
 
 
 
Year ending December 31:
 
Remaining nine months of 2013
$
1,767

2014
2,356

2015
2,356

2016
2,356

2017
1,571

2018
—