Other Accrued Liabilities (Details 1) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 4,179	[1]	$ 7,651
Additions that reduce net sales	7,124		16,090
Deductions from reserves	(9,615)		(18,875)
Balance at end of period	$ 1,688	[1]	$ 4,866

[1] The activity in the accrued sales returns liability account was as follows: