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

6 Months Ended

Dec. 31, 2011

Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components Of Net Periodic Benefit Cost

	Three Months Ended December 31		Six Months Ended December 31
	2011	2010	2011	2010
Components of net periodic benefit cost
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 cost	$ 34	$ 27	$   68	$  54