Accrued Liabilities (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Jan. 03, 2015
Other Liabilities Disclosure [Abstract]
Accrued customer rebates, fees and reimbursements	$ 11,857	$ 11,645
Accrued legal fees	5,785	5,117
Accrued donations	5,612	300
Accrued arbitration award	5,391	0
Accrued taxes	5,263	4,372
Accrued stock repurchases	4,815	0
Accrued warranty	1,222	1,416
Accrued other	4,277	1,691
Total accrued liabilities	$ 44,222	$ 24,541