Accounts Receivable and Allowances for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Accounts receivable and installment contract receivables balances contract
Accounts receivable	$ 99,686	$ 112,494
Installment contract receivables, short-term	37,086	87,003
Installment contract receivables, long-term	11,371	23,380
Total receivables	148,143	222,877
Less allowance for doubtful accounts	0	(7,604)	(23,744)
Total accounts receivable, net and installment contract receivables	$ 148,143	$ 215,273