Intangible Assets Including Goodwill - Carrying Value of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 32,893		$ 32,893		$ 42,604
Accumulated Amortization	(21,779)		(21,779)		(23,132)
Net Carrying Amount	11,114		11,114		19,472
Total intangible assets, net carrying amount	11,114		11,114		19,472
Amortization of Intangible Assets	800	$ 800	2,700	$ 2,500
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,579		2,579		2,579
Accumulated Amortization	(1,912)		(1,912)		(1,779)
Net Carrying Amount	667		$ 667		800
Intellectual Property [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years	10 years
Intellectual Property [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years	15 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	28,861		$ 28,861		38,572
Accumulated Amortization	(18,414)		(18,414)		(19,915)
Net Carrying Amount	10,447		$ 10,447		18,657
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			6 years	6 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years	15 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,453		$ 1,453		1,453
Finite-Lived Intangible Asset, Useful Life			4 years	4 years
Accumulated Amortization	(1,453)		$ (1,453)		(1,438)
Net Carrying Amount	0		0		$ 15
Iron and Steel Customer Relationship [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)			5,600
Finite-Lived Intangible Assets, Gross	9,400		$ 9,400
Finite-Lived Intangible Assets, Remaining Amortization Period			9 years
Accumulated Amortization	$ (3,800)		$ (3,800)