Intangible Assets - Intangible Assets, Other than Capitalized Software Development Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 88,450	$ 130,950
Accumulated amortization	(61,048)	(94,250)
Net intangible assets	27,402	36,700
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	39,200	39,200
Accumulated amortization	(28,955)	(26,349)
Net intangible assets	10,245	12,851
Trade Names
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	250	250
Accumulated amortization	(104)	(67)
Net intangible assets	146	183
Computer Software, Intangible Asset
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	49,000	91,500
Accumulated amortization	(31,989)	(67,834)
Net intangible assets	$ 17,011	$ 23,666