3. Employee Retirement Benefit Plans: Schedule of Net Periodic Benefit Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2015	Jun. 27, 2014	Jul. 03, 2015	Jun. 27, 2014
Pension Expenses for the period	$ 49	$ 209	$ 424	$ 418
Pension Plans, Defined Benefit
Service cost	0	0	0	0
Interest cost	0	569	617	1,137
Expected return on assets	0	(574)	(585)	(1,149)
Amortization of actuarial loss	0	101	195	203
Amortization of prior year service cost	0	0	0	0
Settlement charge	0	0	0	0
Net periodic benefit cost	0	96	227	191
Insurance premium due PBGC	0	58	99	116
Pension Expenses for the period	0	154	326	307
Supplemental Executive Retirement Plan
Service cost	0	0	0	0
Interest cost	44	55	88	110
Expected return on assets	0	0	0	0
Amortization of actuarial loss	17	12	34	25
Amortization of prior year service cost	(12)	(12)	(24)	(24)
Settlement charge	0	0	0	0
Net periodic benefit cost	49	55	98	111
Insurance premium due PBGC	0	0	0	0
Pension Expenses for the period	$ 49	$ 55	$ 98	$ 111