Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended	15 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020	Mar. 31, 2021
Restructuring costs by type [Abstract]
Severance costs and other benefits	$ 1,032	$ 3,901	$ 5,254	$ 3,901		$ 14,029
Facility costs	626	2,658	870	2,658		4,580
Impairment of Intangible Assets, Finite-lived	0	0	0	0		1,525
Other Restructuring Costs	202	0	461	0		461
Restructuring costs	1,860	6,559	6,585	6,559	$ 14,000	20,595
Restructuring costs reserve [Roll Forward]
Restructuring reserve balance	2,260		2,260		$ 2,403	2,260
Restructuring costs incurred			3,510
Cash payments			(3,143)
Operating lease and fixed asset impairments due to restructuring			(510)
Utility and Power Infrastructure [Member]
Restructuring costs by type [Abstract]
Severance costs and other benefits	291	632	1,109	632		2,450
Facility costs	112	303	117	303		351
Impairment of Intangible Assets, Finite-lived	0	0	0	0		1,150
Restructuring costs	403	935	1,226	935		3,951
Process and Industrial Facilities
Restructuring costs by type [Abstract]
Severance costs and other benefits	315	2,506	2,905	2,506		9,073
Facility costs	264	1,581	279	1,581		3,035
Impairment of Intangible Assets, Finite-lived	0	0	0	0		375
Other Restructuring Costs	202	0	461	0		461
Restructuring costs	781	4,087	3,645	4,087		12,944
Storage and Terminal Solutions
Restructuring costs by type [Abstract]
Severance costs and other benefits	423	47	1,076	47		1,422
Facility costs	167	774	168	774		888
Restructuring costs	590	821	1,244	821		2,310
Corporate [Member]
Restructuring costs by type [Abstract]
Severance costs and other benefits	3	716	164	716		1,084
Facility costs	83	0	306	0		306
Restructuring costs	$ 86	$ 716	$ 470	$ 716		$ 1,390