Property, Plant, and Equipment (Tables)

12 Months Ended

Jun. 30, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

	June 30, 2023		June 30, 2022
	(In thousands)
Property, plant and equipment - at cost:
Land and buildings	$	37,263	$	34,788
Construction equipment	84,258		93,036
Transportation equipment	40,606		48,999
Office equipment and software	38,178		43,823
Construction in progress	84		1,646
Total property, plant and equipment - at cost	200,389		222,292
Accumulated depreciation	(152,844)		(168,423)
Property, plant and equipment - net	$	47,545	$	53,869

Long-lived Assets by Geographic Areas [Table Text Block]

Geographical Disaggregation of Long-Lived Assets

	Long-Lived Assets
	June 30, 2023		June 30, 2022		June 30, 2021
	(In thousands)
United States	$	122,398	$	137,682	$	157,442
Canada	3,988		3,436		6,523
Other international	11,862		12,263		12,372
	$	138,248	$	153,381	$	176,337