Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Sales incentive and advertising accruals	$ 25,761	$ 22,235
Vacation liability	7,432	7,001
Dividend payable	8,535	7,716
Labor related liabilities	8,431	7,720
Other	10,318	10,089
Accrued liabilities	$ 60,477	$ 54,761