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Accrued Liabilities
6 Months Ended
Jun. 30, 2013
Payables and Accruals [Abstract]  
Accrued Liabilities
Accrued Liabilities

Accrued liabilities at June 30, 2013 and December 31, 2012 consisted of the following:

 
June 30, 2013

 
December 31, 2012
Accrued salaries, wages and benefits
$
3,414

 
$
3,552

Accrual for self-insurance liabilities
3,949

 
3,806

Property taxes
1,529

 
2,458

Other accrued expenses
509

 
2,640

 
$
9,401

 
$
12,456