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Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2012
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities
Accrued liabilities consist of the following balances:
 
 
December 31,
(in thousands)
 
2012
 
2011
Salaries, wages and bonuses
 
$
12,433

 
$
13,956

Warranty
 
5,007

 
5,083

State taxes
 
4,922

 
4,473

Other
 
9,239

 
7,061

 
 
$
31,601

 
$
30,573