Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Revenue, Performance Obligation [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 574,600		$ 574,600
Performance obligations to be recognized as revenue within next twelve months	432,800		432,800
Contract with Customer, Asset and Liability [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts	46,588		46,588		$ 44,752
Change in CIE			1,836
Billings on uncompleted contracts in excess of costs and estimated earnings	(99,762)		(99,762)		(65,106)
Change in BIE			(34,656)
Contract with customer, current liability, net	(53,174)		(53,174)		(20,354)
Change in net contract balances			(32,820)
Contract with Customer, Liability, Revenue Recognized			52,300
Disclosure Customer Contracts Additional Information [Abstract]
Construction Contractor, Receivable, Retainage, Year One	19,700		19,700		16,100
Construction Contractor, Receivable, Retainage, after Year One	9,000		9,000		$ 4,000
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	193,840	$ 161,965	402,271	$ 330,058
Fixed-price Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	105,283	100,841	214,756	202,906
Time-and-materials Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	88,557	61,124	187,515	127,152
United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	170,290	145,917	346,470	299,201
Canada
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	20,885	15,260	45,810	28,770
Other international
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 2,665	$ 788	$ 9,991	$ 2,087