Goodwill and Other Intangibles Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended				12 Months Ended
	Sep. 30, 2021		Sep. 30, 2020		Mar. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	$ 80,164		$ 19,362		$ 80,160
Accumulated amortization	(12,654)		(3,053)		(7,856)
Net carrying value	67,510		$ 16,309		72,304
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life			13 years
Gross carrying value	62,500	[1]	$ 9,500	[1]	62,500
Accumulated amortization	(6,097)	[1]	(548)	[1]	(3,323)
Net carrying value	$ 56,403	[1]	$ 8,952		$ 59,177
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	11 years				11 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	13 years				13 years
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years		5 years		5 years
Gross carrying value	$ 11,100	[1]	$ 3,300	[1]	$ 11,100
Accumulated amortization	(2,715)	[1]	(495)	[1]	(1,605)
Net carrying value	$ 8,385	[1]	$ 2,805		$ 9,495
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	3 years		3 years		3 years
Gross carrying value	$ 4,800	[1]	$ 4,800	[1]	$ 4,800
Accumulated amortization	(2,800)	[1]	(1,200)	[1]	(2,000)
Net carrying value	$ 2,000	[1]	$ 3,600		$ 2,800
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years		5 years		5 years
Gross carrying value	$ 1,000	[1]	$ 1,000	[1]	$ 1,000
Accumulated amortization	(350)	[1]	(150)	[1]	(250)
Net carrying value	$ 650	[1]	$ 850		$ 750
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	5 years		5 years		5 years
Gross carrying value	$ 764		$ 762		$ 760
Accumulated amortization	(692)		(660)		(678)
Net carrying value	$ 72		$ 102		$ 82

[1] On October 1, 2020 the Company acquired 100% of the capital stock of Silva for approximately $164.0 million in cash and $5.9 million of working capital on-hand at the date of acquisition. The Silva acquisition resulted in $60.8 million of intangibles. See Note 3 for additional information.