Pension Benefits (Summary Of The Fair Values And Levels Within The Fair Value Hierarchy Of Pension Plan Assets) (Details) - Defined Benefit Pension Plans [Member] - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 36,713	$ 36,769	$ 35,682
Cash And Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	547	472
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,331	599
U.S. Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,344	3,598
Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36	36
Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,176	3,805
Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,354	2,199
Mutual Funds Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,044	8,109
Mutual Funds Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,881	17,951
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27,803	27,131
Level 1 [Member] | Cash And Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	547	472
Level 1 [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,331	599
Level 1 [Member] | U.S. Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Mutual Funds Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,044	8,109
Level 1 [Member] | Mutual Funds Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18,881	17,951
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,910	9,638
Level 2 [Member] | Cash And Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 [Member] | U.S. Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,344	3,598
Level 2 [Member] | Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	36	36
Level 2 [Member] | Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,176	3,805
Level 2 [Member] | Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,354	2,199
Level 2 [Member] | Mutual Funds Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 [Member] | Mutual Funds Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Cash And Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | U.S. Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Mutual Funds Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Mutual Funds Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0