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Accounts Payable and Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Accounts payable and accrued liabilities    
Accounts payable $ 6,426 $ 6,203
Accrued Liabilities:    
Employee benefits 6,412 7,764
Contingent consideration 732  
Taxes other than on income 563 401
Customer tooling 375 425
Insurance 366 372
Other 1,124 1,075
Total $ 15,998 $ 16,240