Pension and Postretirement Benefits - Summary of Net Periodic Benefit Cost Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2023	Jan. 01, 2023
SERP Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service cost	$ 21	$ 19	$ 42	$ 39
Interest cost	22	24	45	47
Amortization of unrecognized net loss	12	31	23	62
Net periodic benefit cost	55	74	110	148
Postretirement Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service cost	2	2	4	5
Interest cost	16	15	31	30
Amortization of unrecognized net loss	49	61	98	121
Net periodic benefit cost	$ 67	$ 78	$ 133	$ 156