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Pension Benefits
 6 Months Ended
Dec. 31, 2015
Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Pension Benefits
Pension Benefits
We sponsor multiple defined benefit pension plans that covered certain workers under collective bargaining contracts. However, as a result of prior-years’ restructuring activities, for all periods presented, we no longer have any active employees continuing to accrue service cost or otherwise eligible to receive plan benefits. Benefits being paid under the plans are primarily based on negotiated rates and years of service. We contribute to these plans at least the minimum amount required by regulation.
The following table summarizes the components of net periodic benefit income for our pension plans:
 
Three Months Ended 
 December 31,
 
Six Months Ended 
 December 31,
 
2015
 
2014
 
2015
 
2014
Components of net periodic benefit income
 
 
 
 
 
 
 
Interest cost
$
421

 
$
403

 
$
842

 
$
806

Expected return on plan assets
(630
)
 
(658
)
 
(1,260
)
 
(1,316
)
Amortization of unrecognized net loss
135

 
107

 
270

 
214

Net periodic benefit income
$
(74
)
 
$
(148
)
 
$
(148
)
 
$
(296
)

For the three and six months ended December 31, 2015, we made no pension plan contributions and we do not expect to make any contributions to our pension plans during 2016.