Pension and Other Postretirement Benefit Plans (Details) (USD $)	3 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Pension Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 44,000	$ 46,000
Interest cost	1,308,000	1,510,000
Expected return on plan assets	(1,571,000)	(1,919,000)
Amortization of net actuarial loss	834,000	580,000
Net periodic benefit cost	615,000	217,000
Expected contribution to its pension plan in 2013	4,440,000
Contributions made during period	3,491,000
Postretirement Benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	8,000	11,000
Interest cost	192,000	246,000
Amortization of net actuarial loss	198,000	105,000
Net periodic benefit cost	$ 398,000	$ 362,000