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Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accrued Liabilities    
Sales incentive and advertising accruals $ 17,076 $ 14,141
Labor related liabilities 8,309 6,337
Dividend payable 6,053 6,020
Vacation liability 5,818 5,201
Other 7,667 4,457
Accrued liability $ 44,923 $ 36,156