Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (Postretirement Benefits [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8	$ 6	$ 24	$ 18
Interest cost	28	37	84	111
Amortization of unrecognized net gain	(6)	(8)	(16)	(24)
Amortization of prior service asset	(1)	(1)	(3)	(3)
Net periodic benefit (income) cost	$ 29	$ 34	$ 89	$ 102