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, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 6	$ 18	$ 18
Interest cost	37	34	111	102
Amortization of unrecognized net gain	(8)	(12)	(24)	(36)
Amortization of prior service asset	(1)	(1)	(3)	(3)
Net periodic benefit (income) cost	$ 34	$ 27	$ 102	$ 81