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Summary Of Significant Accounting Policies (Tables)
6 Months Ended
Dec. 31, 2023
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: 
 December 31,
 20232022
Construction in progress in Accounts Payable$6,408 $15,062 
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 
December 31,
Six Months Ended 
December 31,
 2023202220232022
Net income$51,484 $39,973 $95,435 $77,565 
Net income available to participating securities(157)(118)(292)(232)
Net income available to common shareholders$51,327 $39,855 $95,143 $77,333 
Weighted average common shares outstanding – basic27,425 27,471 27,437 27,460 
Incremental share effect from:
Nonparticipating restricted stock3 3 
Stock-settled stock appreciation rights (1)
7 18 9 
Performance units5 8 
Weighted average common shares outstanding – diluted27,440 27,493 27,457 27,476 
Net income per common share – basic$1.87 $1.45 $3.47 $2.82 
Net income per common share – diluted$1.87 $1.45 $3.47 $2.81 
(1)Excludes the impact of the following weighted average stock-settled stock appreciation rights outstanding with an antidilutive effect: 0.1 million for the three months ended December 31, 2023 and 2022; and 0.1 million and 0.2 million for the six months ended December 31, 2023 and 2022, respectively.
Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss
The following table presents the amounts reclassified out of accumulated other comprehensive loss by component:
Three Months Ended 
December 31,
Six Months Ended 
December 31,
2023202220232022
Accumulated other comprehensive loss at beginning of period$(9,289)$(11,077)$(9,365)$(11,172)
Defined Benefit Pension Plan Items:
Amortization of unrecognized net loss158 182 317 363 
Postretirement Benefit Plan Items:
Amortization of unrecognized net gain(15)(11)(30)(23)
Amortization of prior service credit(45)(46)(90)(91)
Total other comprehensive income, before tax98 125 197 249 
Total tax expense(23)(30)(46)(59)
Other comprehensive income, net of tax75 95 151 190 
Accumulated other comprehensive loss at end of period$(9,214)$(10,982)$(9,214)$(10,982)