Leases (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Rent expense
Capital Leases Entered Into - Computer Equipment and Software	$ 83,000	$ 466,000	$ 674,000
Capital lease obligations, current	200,000	400,000
Capital lease obligations, noncurrent	100,000	300,000
Operating leases, future minimum payments due [Abstract]
2012	32,773,000
2013	26,915,000
2014	19,830,000
2015	13,521,000
2016	10,014,000
Thereafter	9,761,000
Total future minimum lease payments	112,814,000
Capital leases, future minimum payments due [Abstract]
2012	192,000
2013	112,000
2014	3,000
2015	0
2016	0
Thereafter	0
Total future minimum lease payments	307,000
Less: amount representing interest	(15,000)
Present value of future minimum lease payments	292,000
Facility Rents [Member]
Rent expense
Minimum rents	32,928,000	33,195,000	36,040,000
Contingent rents	6,480,000	3,074,000	1,507,000
Total	39,408,000	36,269,000	37,547,000
Equipment Rents [Member]
Rent expense
Total	$ 2,469,000	$ 2,259,000	$ 2,238,000