Intangible Assets - Intangible Assets, Other than Capitalized Software Development Costs (Details) - Intangible Assets Other Than Capitalized Software - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 77,950	$ 88,450
Accumulated amortization	(58,211)	(64,147)
Net intangible assets	19,739	24,303
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	39,200	39,200
Accumulated amortization	(31,209)	(29,824)
Net intangible assets	7,991	9,376
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	250	250
Accumulated amortization	(141)	(116)
Net intangible assets	109	134
Computer Software, Intangible Asset
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	38,500	49,000
Accumulated amortization	(26,861)	(34,207)
Net intangible assets	$ 11,639	$ 14,793