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Postretirement Benefits (Postretirement Benefits [Member])
 9 Months Ended
Mar. 31, 2015
Postretirement Benefits [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Postretirement Benefits
Postretirement Benefits
We and certain of our operating subsidiaries provide multiple postretirement medical and life insurance benefit plans. We recognize the cost of benefits as the employees render service. Postretirement benefits are funded as incurred.
The following table summarizes the components of net periodic benefit cost for our postretirement plans:
 
Three Months Ended 
 March 31,
 
Nine Months Ended 
 March 31,
 
2015
 
2014
 
2015
 
2014
Components of net periodic benefit cost
 
 
 
 
 
 
 
Service cost
$
8

 
$
8

 
$
24

 
$
24

Interest cost
27

 
33

 
81

 
97

Amortization of unrecognized net gain
(7
)
 
(6
)
 
(21
)
 
(20
)
Amortization of prior service asset
(1
)
 
(1
)
 
(3
)
 
(3
)
Net periodic benefit cost
$
27

 
$
34

 
$
81

 
$
98


For the three and nine months ended March 31, 2015, we made $20,000 and $74,000, respectively, in contributions to our postretirement medical and life insurance benefit plans. We expect to make approximately $0.1 million more in contributions to our postretirement medical and life insurance benefit plans during the remainder of 2015.