Receivables and Allowances for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Current and long-term receivables balances
Accounts receivable	$ 67,259	$ 99,686
Installment contract receivables, short-term	30,647	37,086
Long-term receivables	7,559	11,371
Total receivables	105,465	148,143
Less allowance for doubtful accounts	(85)	0	(7,604)
Total receivables, net	$ 105,380	$ 148,143