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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Allowance for Doubtful Accounts [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 884 $ 1,039 $ 739
Additions charged to costs and expenses 915 1,224 1,577
Deductions from reserves (1,085) (1,379) (1,277)
Balance at end of period 714 884 1,039
Allowance for Sales Returns [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 15,222 20,562 15,262
Additions charged to costs and expenses 77,226 71,958 84,265
Deductions from reserves (73,178) (77,298) (78,965)
Balance at end of period $ 19,270 $ 15,222 $ 20,562