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Condensed Consolidated Statements Of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Statement of Comprehensive Income [Abstract]    
Net Income $ 22,761 $ 24,801
Defined Benefit Pension and Postretirement Benefit Plans:    
Amortization of loss, before tax 100 108
Amortization of prior service asset, before tax (1) (1)
Total Other Comprehensive Income, Before Tax 99 107
Tax Attributes of Items in Other Comprehensive Income:    
Amortization of loss, tax (36) (40)
Amortization of prior service asset, tax 0 0
Total Tax Expense (36) (40)
Other Comprehensive Income, Net of Tax 63 67
Comprehensive Income $ 22,824 $ 24,868