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Accounts Payable and Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Schedule Of Accrued Liabilities [Line Items]    
Accounts payable $ 5,201 $ 6,203
Accrued liabilities:    
Employee benefits 7,310 7,764
Taxes other than on income 764 401
Insurance 313 372
Customer tooling 249 425
Other 1,220 1,075
Total $ 15,057 $ 16,240