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Accrued Liabilities
12 Months Ended
Dec. 31, 2014
Accrued Liabilities [Abstract]  
Accrued Liabilities
Accrued Liabilities
 
 
December 31,
2014
 
December 31,
2013
 
 
(dollars in thousands)
Self-insurance
 
$
12,510

 
$
12,610

Wages and bonus
 
22,340

 
23,670

Other
 
66,200

 
48,850

Total accrued liabilities
 
$
101,050

 
$
85,130