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Product Warranties (Tables)
3 Months Ended
Mar. 31, 2013
Product Warranties [Abstract]  
Change in accrued warranty expense

Accrued warranty expense is included in Accounts payable and accrued expenses on our condensed consolidated balance sheets, and the change in accrued warranty expense is summarized in the following table:

 

                 
$ in thousands   Three Months
Ended
March 31, 2013
    Three Months
Ended
March 31, 2012
 

Beginning balance

  $ 531     $ 431  

Provision

    36       64  

Payments

    (66     (42

Acquisition

    440       —    
   

 

 

   

 

 

 

Ending balance

  $ 941     $ 453