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, 2020	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 36,768	$ 36,628	$ 36,713
Cash And Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	367	559
Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,046	113
U.S. Government Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,261	2,600
Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	264	37
Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,303	3,440
Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,836	3,613
Mutual Funds Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17,326	6,907
Mutual Funds Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,365	19,359
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	32,104	26,938
Level 1 [Member] | Cash And Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	367	559
Level 1 [Member] | Money Market Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,046	113
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	17,326	6,907
Level 1 [Member] | Mutual Funds Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,365	19,359
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,664	9,690
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	1,261	2,600
Level 2 [Member] | Municipal Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	264	37
Level 2 [Member] | Corporate Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,303	3,440
Level 2 [Member] | Mortgage Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,836	3,613
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