Retirement Benefit Plans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Pension Benefit [Member]
Service Cost	$ 216,153	$ 269,743	$ 432,306	$ 539,487
Interest Cost	990,053	608,191	1,980,107	1,216,380
Expected Return On Plan Assets	(1,049,014)	(1,460,661)	(2,098,030)	(2,921,322)
Amortization Of Prior Service Cost	0	16,563	0	33,126
Amortization Of The Net Loss	342,865	390,075	685,730	780,150
Net Periodic Benefit Cost	(500,057)	176,089	(1,000,113)	352,179
Other Postretirement Benefit [Member]
Service Cost	6,486	13,323	12,972	26,646
Interest Cost	14,533	10,988	29,066	21,976
Expected Return On Plan Assets	(4,849)	(4,400)	(9,698)	(8,800)
Amortization Of The Net Loss	1,060	1,060	2,120	2,120
Net Periodic Benefit Cost	16,895	2,054	33,790	4,108
Gain On Significant Event	$ 335	$ 18,917	$ 670	$ 37,834