Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023
Revenue, Performance Obligation [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 376,500
Performance obligations to be recognized as revenue within next twelve months	293,100
Contract with Customer, Asset and Liability [Abstract]
Costs and estimated earnings in excess of billings on uncompleted contracts	42,369		$ 44,888
Change in CIE	(2,519)
Billings on uncompleted contracts in excess of costs and estimated earnings	(73,133)		(85,436)
Change in BIE	12,303
Contract with customer, current liability, net	(30,764)		(40,548)
Change in net contract balances	9,784
Contract with Customer, Liability, Revenue Recognized	62,900
Project Unapproved Change Orders and Claims [Line Items]
Unapproved change orders and claims	10,100		9,700
Disclosure Customer Contracts Additional Information [Abstract]
Construction Contractor, Receivable, Retainage, Year One	15,200		16,300
Construction Contractor, Receivable, Retainage, after Year One	13,400		$ 10,000
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	197,659	$ 208,431
Fixed-price Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	116,757	109,473
Time-and-materials Contract
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	80,902	98,958
United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	177,550	176,180
Canada
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	16,873	24,925
Other international
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 3,236	$ 7,326