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

9 Months Ended

Mar. 31, 2013

Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components Of Net Periodic Benefit Cost

	Three Months Ended				Nine Months Ended
	March 31,				March 31,
	2013		2012		2013		2012
Components of net periodic benefit cost
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 cost	$	29	$	34	$	89	$	102