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Summary Of Significant Accounting Policies (Tables)
3 Months Ended
Sep. 30, 2024
Accounting Policies [Abstract]  
Schedule Of Construction In Progress In Accounts Payable Purchases of property, plant and equipment included in Accounts Payable and excluded from the property additions and the change in accounts payable in the Condensed Consolidated Statements of Cash Flows were as follows: 
 September 30,
 20242023
Construction in progress in Accounts Payable$4,165 $10,165 
Schedule Of Basic And Diluted Net Income Per Common Share Calculations
Basic and diluted net income per common share were calculated as follows:
Three Months Ended 
September 30,
 20242023
Net income$44,701 $43,951 
Net income available to participating securities(124)(136)
Net income available to common shareholders$44,577 $43,815 
Weighted average common shares outstanding – basic27,457 27,449 
Incremental share effect from:
Nonparticipating restricted stock4 
Stock-settled stock appreciation rights (1)
3 11 
Performance units14 10 
Weighted average common shares outstanding – diluted27,478 27,473 
Net income per common share – basic$1.62 $1.60 
Net income per common share – diluted$1.62 $1.59 
(1)Excludes the impact of 0.1 million weighted average stock-settled stock appreciation rights outstanding for the three months ended September 30, 2023 because their effect was antidilutive.
Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss
The following table presents the amounts reclassified out of accumulated other comprehensive loss by component:
Three Months Ended 
September 30,
20242023
Accumulated other comprehensive loss at beginning of period$(8,640)$(9,365)
Defined Benefit Pension Plan Items:
Amortization of unrecognized net loss147 159 
Postretirement Benefit Plan Items:
Amortization of unrecognized net gain(15)(15)
Amortization of prior service credit(45)(45)
Total other comprehensive income, before tax87 99 
Total tax expense(20)(23)
Other comprehensive income, net of tax67 76 
Accumulated other comprehensive loss at end of period$(8,573)$(9,289)