Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Jan. 01, 2012
Restricted cash and investments, current	$ 15,654	$ 42,534
Allowance for doubtful accounts	2,546	2,453
Restricted cash and investments, non-current	32,756	56,925
Property and equipment, net	1,687,159	1,688,356
Current portion of capital lease obligations, long-term debt and non-recourse debt	53,882	53,653
Non-recourse debt	104,836	208,532
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	86,007,443	85,185,158
Common stock, shares outstanding	71,417,034	61,181,172
Treasury stock, shares	14,590,399	24,003,986
Variable Interest Entity, Primary Beneficiary
Restricted cash and investments, current	6,182	35,435
Restricted cash and investments, non-current	15,521	38,930
Property and equipment, net	25,840	162,665
Current portion of capital lease obligations, long-term debt and non-recourse debt	5,200	20,770
Non-recourse debt	$ 16,997	$ 108,335