Restructuring Costs (Details) - USD ($)	12 Months Ended			30 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]
Severance costs and other benefits	$ 596,000	$ 5,545,000	$ 8,773,000	$ 14,914,000
Facility costs	33,000	785,000	3,712,000	4,530,000
Other intangible asset impairments	0	0	1,525,000	1,525,000
Other Restructuring Costs	17,000	426,000	0	443,000
Restructuring costs	646,000	6,756,000	14,010,000	21,412,000
Utility and Power Infrastructure
Restructuring Cost and Reserve [Line Items]
Severance costs and other benefits	45,000	1,199,000	1,340,000	2,584,000
Facility costs	0	113,000	235,000	348,000
Other intangible asset impairments	0	0	1,150,000	1,150,000
Other Restructuring Costs	1,000	0	0	1,000
Restructuring costs	46,000	1,312,000	2,725,000	4,083,000
Process and Industrial Facilities
Restructuring Cost and Reserve [Line Items]
Severance costs and other benefits	(22,000)	2,951,000	6,167,000	9,096,000
Facility costs	17,000	431,000	2,757,000	3,205,000
Other intangible asset impairments	0	0	375,000	375,000
Other Restructuring Costs	(1,597,000)	426,000	0	(1,171,000)
Restructuring costs	(1,602,000)	3,808,000	9,299,000	11,505,000
Storage and Terminal Solutions
Restructuring Cost and Reserve [Line Items]
Severance costs and other benefits	69,000	1,231,000	347,000	1,647,000
Facility costs	0	159,000	720,000	879,000
Other Restructuring Costs	28,000	0	0	28,000
Restructuring costs	97,000	1,390,000	1,067,000	2,554,000
Unallocated Corporate Costs
Restructuring Cost and Reserve [Line Items]
Severance costs and other benefits	504,000	164,000	919,000	1,587,000
Facility costs	16,000	82,000	0	98,000
Other Restructuring Costs	1,585,000	0	0	1,585,000
Restructuring costs	$ 2,105,000	$ 246,000	$ 919,000	$ 3,270,000