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Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Multiemployer Plans [Line Items]
Contributions to other multiemployer plans	$ 3,729,000	$ 3,848,000	$ 8,352,000
Total contributions made	$ 16,818,000	$ 15,369,000	37,403,000
Boilermaker-Blacksmith National Pension Trust [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	48-6168020/001
Multiemployer Plans, Underfunded Status, Description	Yellow	Yellow
FIP/RP Status Pending or Implemented	Implemented
Multiemployer Plan, Employer Contribution, Cost	$ 5,208,000	$ 4,003,000	6,634,000
Surcharge Imposed	No
National Electrical Benefit Fund, Local 488 and 126 [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	53-0181657/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 2,973,000	$ 1,865,000	2,674,000
Surcharge Imposed	No
Joint Pension Fund Local Union One Six Four Ibew [Domain]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	22-6031199/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Described below (1)
FIP/RP Status Pending or Implemented	Implemented
Multiemployer Plan, Employer Contribution, Cost	$ 1,514,000	$ 1,958,000	1,560,000
Surcharge Imposed	No
Joint Pension Fund Local Union Number 102 IBEW [Member] [Domain]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	22-1615726/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 906,000	$ 1,341,000	1,227,000
Surcharge Imposed	No
IBEW Local 456 Pension Plan [Member] [Domain]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	22-6238995/001
Multiemployer Plans, Underfunded Status, Description	Green	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 734,000	$ 595,000	427,000
Surcharge Imposed	No
Local 351 IBEW Pension Plan [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	22-3417366/001
Multiemployer Plans, Underfunded Status, Description	Green	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 395,000	$ 479,000	1,709,000
Surcharge Imposed	No
Steamfitters Local Union Number 420 Pension Plan [Member] [Domain]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	23-2004424/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Red
FIP/RP Status Pending or Implemented	Implemented
Multiemployer Plan, Employer Contribution, Cost	$ 498,000	$ 442,000	1,523,000
Surcharge Imposed	Yes
IBEW Local 654 Pension Plan
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	23-6538183/001
Multiemployer Plans, Underfunded Status, Description	Green	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 857,000	$ 818,000	1,021,000
Surcharge Imposed	No
OhioCarpentersPensionFundLocal1090and351
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	34-6574360/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Red
FIP/RP Status Pending or Implemented	Implemented
Multiemployer Plan, Employer Contribution, Cost	$ 0	$ 0	3,042,000
Surcharge Imposed	Yes
Iron Workers Pension Plan, Loc. 55 [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	34-6682351/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 0	$ 0	2,951,000
Surcharge Imposed	No
Northwestern Ohio Plumbers and Pipe Fitters Local 50 [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	34-6502487/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 0	$ 0	2,504,000
Surcharge Imposed	No
Indiana Laborers Pension Fund [Domain]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	35-6027150/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 0	$ 20,000	1,604,000
Surcharge Imposed	No
Ironworkers Mid-America Pension Plan, Local 395 [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	36-6488227/001
Multiemployer Plans, Underfunded Status, Description	Green	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 0	$ 0	840,000
Surcharge Imposed	No
Pipefitters Retirement Fund, Local 597 [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	62-6105084/001
Multiemployer Plans, Underfunded Status, Description	Described below (1)	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 4,000	$ 0	835,000
Surcharge Imposed	No
Iron Workers Pension Plan of Western Pennsylvania, Local 3 [Member]
Multiemployer Plans [Line Items]
EIN/Pension Plan Number	25-1283169/001
Multiemployer Plans, Underfunded Status, Description	Green	Green
FIP/RP Status Pending or Implemented	NA
Multiemployer Plan, Employer Contribution, Cost	$ 0	$ 0	$ 500,000
Surcharge Imposed	No

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