Postretirement Benefits Schedule of Net Funded Status and APBO (Details) (USD $)	12 Months Ended
	Dec. 30, 2012 Rate	Jan. 01, 2012 Rate	Jan. 02, 2011
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Benefit obligation at beginning of year	$ 2,055,000	$ 1,845,000
Service cost	60,000	7,000	23,000
Interest cost	106,000	87,000	103,000
Plan participants' contributions	72,000	67,000
Actuarial loss (gain)	581,000	350,000
Benefits paid	(269,000)	(318,000)
Medicare part D prescription drug subsidy	17,000	17,000
Benefit obligation at end of year	2,622,000	2,055,000	1,845,000
Employer contributions	180,000	234,000
Fair value of plan assets at beginning of year	0	0
Fair value of plan assets at end of year	0	0	0
Funded status	(2,622,000)	(2,055,000)
Discount rate used to determine benefit obligations	$ 0.0364	$ 0.0440
Discount rate used to determine net periodic benefit cost	4.40%	5.54%