XML 103 R81.htm IDEA: XBRL DOCUMENT v3.7.0.1
Pension and Other Postretirement Benefits - Components of Net Periodic Other Postretirement Benefit Cost (Details) - Other postretirement benefit plans [Member] - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Net periodic other postretirement benefit costs      
Service cost $ 0 $ 0 $ 45
Interest cost 673 840 934
Amortization of prior service credit (22) (22) (59)
Recognition of actuarial loss 355 324 492
Curtailment Gain 0 0 (221)
Net Periodic Benefit (Income) Cost $ 1,006 $ 1,142 $ 1,191