Pension and Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 27, 2015	Dec. 28, 2014
Pension Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service cost	$ 13	$ 16	$ 25	$ 32
Interest cost	1,076	1,043	2,152	2,086
Expected return on plan assets	(1,352)	(1,544)	(2,703)	(3,087)
Amortization of prior service cost (credit)	3	3	6	6
Amortization of unrecognized net loss	599	694	1,198	1,387
Net periodic benefit cost	339	212	678	424
Postretirement Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service cost	3	3	6	7
Interest cost	22	29	43	57
Amortization of prior service cost (credit)	(188)	(191)	(375)	(382)
Amortization of unrecognized net loss	151	174	302	347
Net periodic benefit cost	$ (12)	$ 15	$ (24)	$ 29