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Accrued Liabilities
 12 Months Ended
Dec. 31, 2012
Payables and Accruals [Abstract]  
Accrued Liabilities
Accrued Liabilities

Accrued liabilities at December 31, 2012 and 2011 consisted of the following:

 
2012
 
2011
Accrued salaries, wages and benefits
$
3,552

 
$
2,913

Accrual for self-insurance liabilities
3,806

 
3,401

Property taxes
2,458

 
2,358

Other accrued expenses
2,640

 
667

 
$
12,456

 
$
9,339