Postretirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (Postretirement Benefits [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 6	$ 12	$ 12
Interest cost	37	34	74	68
Amortization of unrecognized net gain	(8)	(12)	(16)	(24)
Amortization of prior service asset	(1)	(1)	(2)	(2)
Net periodic benefit (income) cost	$ 34	$ 27	$ 68	$ 54