Retirement Benefit Plans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Pension Benefit [Member]
Service Cost	$ 269,743	$ 271,835	$ 539,487	$ 543,668
Interest Cost	608,191	504,254	1,216,380	1,008,509
Expected Return On Plan Assets	1,460,661	1,448,675	2,921,322	2,897,349
Amortization Of Prior Service Cost	16,563	24,845	33,126	49,690
Amortization Of The Net Loss	390,075	432,536	780,150	865,075
Net Periodic Benefit Cost	176,089	215,205	352,179	430,407
Other Postretirement Benefit [Member]
Service Cost	13,323	13,626	26,646	27,252
Interest Cost	10,988	9,842	21,976	19,684
Expected Return On Plan Assets	4,400	6,420	8,800	12,840
Amortization Of Prior Service Cost	1,060	0	2,120	0
Amortization Of The Net Loss	(2,054)	(3,094)	(4,108)	(6,188)
Net Periodic Benefit Cost	$ (18,917)	$ (13,954)	$ (37,834)	$ (27,908)