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Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
Statement of Comprehensive Income [Abstract] |  |  |
Net Income | $ 121,764 | $ 101,686 | $ 74,986
Defined Benefit Pension and Postretirement Benefit Plans: |  |  |
Net (loss) gain arising during the period, before tax | (4,200) | (3,563) | 96
Prior service credit arising during the period, before tax | 1,770 | 0 | 0
Amortization of loss, before tax | 505 | 401 | 433
Amortization of prior service credit, before tax | (126) | (5) | (5)
Total Other Comprehensive (Loss) Income, Before Tax | (2,051) | (3,167) | 524
Tax Attributes of Items in Other Comprehensive (Loss) Income: |  |  |
Net (loss) gain arising during the period, tax | 1,551 | 1,318 | (36)
Prior service credit arising during the period, tax | (654) | 0 | 0
Amortization of loss, tax | (186) | (149) | (160)
Amortization of prior service credit, tax | 47 | 2 | 2
Total Tax Benefit (Expense) | 758 | 1,171 | (194)
Other Comprehensive (Loss) Income, Net of Tax | (1,293) | (1,996) | 330
Comprehensive Income | $ 120,471 | $ 99,690 | $ 75,316

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