Pension and Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 01, 2017	Dec. 27, 2015	Jan. 01, 2017	Dec. 27, 2015
Pension Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service cost	$ 13	$ 13	$ 27	$ 25
Interest cost	981	1,076	1,962	2,152
Expected return on plan assets	(1,463)	(1,352)	(2,927)	(2,703)
Amortization of prior service cost (credit)	3	3	6	6
Amortization of unrecognized net loss	807	599	1,614	1,198
Net periodic benefit cost (credit)	341	339	682	678
Postretirement Benefits
COMPONENTS OF NET PERIODIC BENEFIT COST:
Service cost	4	3	7	6
Interest cost	13	22	27	43
Amortization of prior service cost (credit)	(191)	(188)	(382)	(375)
Amortization of unrecognized net loss	134	151	269	302
Net periodic benefit cost (credit)	$ (40)	$ (12)	$ (79)	$ (24)