Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2017

Commitments and Contingencies Disclosure [Abstract]

Sales Returns

The activity in the sales returns liability account was as follows (in thousands):

	Nine Months Ended
	September 30, 2017			October 1, 2016
Balance at beginning of year	$	15,222		$	20,562
Additions that reduce net sales	55,720			54,588
Deductions from reserves	(52,494		)	(57,112		)
Balance at end of period	$	18,448		$	18,038

Warranty Liabilities

The activity in the accrued warranty liabilities account was as follows (in thousands): 

	Nine Months Ended
	September 30, 2017			October 1, 2016
Balance at beginning of year	$	8,633		$	10,028
Additions charged to costs and expenses for current-year sales	8,627			7,014
Deductions from reserves	(6,625		)	(7,976		)
Changes in liability for pre-existing warranties during the current year, including expirations	(708		)	(976		)
Balance at end of period	$	9,927		$	8,090