Postretirement Benefits (Tables) (Postretirement Benefits [Member])

9 Months Ended

Mar. 31, 2012

Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components Of Net Periodic Benefit Cost

	Three MonthsEndedMarch 31		Nine MonthsEndedMarch 31
	2012	2011	2012	2011
Components of net periodic benefit cost
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 cost............................................	$34	$27	$102	$81