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Postretirement Benefits (Tables) (Postretirement Benefits [Member])
 3 Months Ended
Sep. 30, 2013
Postretirement Benefits [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Components Of Net Periodic Benefit Cost
The following table summarizes the components of net periodic benefit cost for our postretirement plans:
 
 
Three Months Ended 
 September 30,
 
2013
 
2012
Components of net periodic benefit cost
 
 
 
Service cost
$
8

 
$
8

Interest cost
32

 
28

Amortization of unrecognized net gain
(7
)
 
(5
)
Amortization of prior service asset
(1
)
 
(1
)
Net periodic benefit cost
$
32

 
$
30