Debt (Details) (USD $) In Thousands, unless otherwise specified											3 Months Ended
	Apr. 01, 2012		Jan. 01, 2012		Apr. 01, 2012 6.625% Senior Notes [Member]	Jan. 01, 2012 6.625% Senior Notes [Member]	Apr. 01, 2012 7.75% Senior Notes [Member]	Jan. 01, 2012 7.75% Senior Notes [Member]	Apr. 01, 2012 Non Recourse Debt [Member]	Jan. 01, 2012 Non Recourse Debt [Member]	Apr. 01, 2012 Unused Letters of Credit [Member]	Apr. 01, 2012 Unused Revolver [Member]	Apr. 01, 2012 Minimum [Member]	Apr. 01, 2012 Maximum [Member]
Summary of debt [Abstract]
Capital Lease Obligations	$ 13,907		$ 14,171
Senior Credit Facility:
Term loans	478,250		482,500
Discount on term loan	(1,453)		(1,538)				(2,762)	(2,859)	(1,804)	(1,936)
Revolver	302,000		302,000
Total Senior Credit Facility	778,797		782,962
Notes Due					300,000	300,000	250,000	250,000
Swap on Notes							7,180	7,411
Total 7 3/4% Senior Notes							254,418	254,552
Non-Recourse Debt	229,558		235,430
Premium on Non-Recourse Debt									7,583	8,304
Total Non-Recourse Debt	235,337		241,798
Other debt	765		870
Total debt	1,583,224		1,594,353
Current portion of capital lease obligations, long-term debt and non-recourse debt	(56,020)	[1]	(53,666)	[1]
Capital Lease Obligations, long-term portion	(12,719)		(13,087)
Non-Recourse Debt	(201,653)		(208,532)
Long-Term Debt	$ 1,312,832		$ 1,319,068
Indebtedness under the revolver and the term loan A and term loan A-2 bears interest
Debt instrument interest rate in addition to LIBOR													2.00%	3.00%
Debt instrument interest rate in addition to base rate borrowings													1.00%	2.00%
Bonds fixed coupon rates minimum											2.00%	0.375%
Bonds fixed coupon rates maximum											3.00%	0.50%

[1] Variable interest entities or “VIEs”