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5. Commitments and Contingencies: Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 3 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Positive Outcome of Litigation
Jun. 30, 2012
Insurance Claims
Jun. 30, 2012
Pending or Threatened Litigation
Dec. 31, 2011
Pending or Threatened Litigation
Product Liability Inurance Deductible - Range, minimum     $ 25    
Product Liability Inurance Deductible - Range, maximum     250    
Product Liability Contingency, Loss Exposure Not Accrued, High Estimate       3,500  
Loss Contingency Accrual, at Carrying Value       610 414
Insurance Legal Recovery 4,700 4,700      
Gain Contingency, Income Statement Caption   Insurance Legal Recovery      
Loss Contingency, Balance Sheet Caption   Other Long Term Assets      
Loss Contingency, Range of Possible Loss, Maximum   $ 354