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

6 Months Ended

Dec. 31, 2012

Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components Of Net Periodic Benefit Cost

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2012		2011		2012		2011
Components of net periodic benefit cost
Service cost	$	8	$	6	$	16	$	12
Interest cost		28		37		56		74
Amortization of unrecognized net gain		(5)		(8)		(10)		(16)
Amortization of prior service asset		(1)		(1)		(2)		(2)
Net periodic benefit cost	$	30	$	34	$	60	$	68