Accounts Receivable and Allowances for Doubtful Accounts (Details) (USD $) In Thousands	Oct. 01, 2011	Jan. 01, 2011
Accounts receivable and installment contact receivables balances
Accounts receivable	$ 123,278	$ 112,494
Installment contract receivables, short-term	29,220	87,003
Installment contract receivables, long-term	9,178	23,380
Total accounts receivable and installment contract receivables	161,676	222,877
Less allowance for doubtful accounts	(65)	(7,604)
Total accounts receivable, net and installment contract receivables	$ 161,611	$ 215,273