Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 17,262	$ 10,251
Adjustments to reconcile net income to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	38,410	42,847
Operating lease right-of-use assets	5,218	5,327
Gain on divestiture of a business	(3,806)	0
Loss on disposal of fixed assets	45	13
Share-based compensation expense	38,289	32,082
Change in fair value of derivative investment	(206)	0
Deferred income taxes	(21,411)	(5,963)
Other gains	(82)	0
Changes in assets and liabilities
Accounts receivable and unbilled costs	(8,952)	8,850
Inventories	(1,211)	2,745
Prepaid expenses and other assets	(7,666)	(15,583)
Accounts payable	(1,109)	(737)
Accrued compensation and other expenses	(49,851)	(19,562)
Operating lease liabilities	(5,908)	(6,128)
Income taxes payable	(2,948)	(4,383)
Deferred revenue	(44,805)	(52,148)
Net cash used in operating activities	(48,731)	(2,389)
Cash flows from investing activities:
Purchase of marketable securities and investments	(41,920)	(60,914)
Proceeds from sales and maturity of marketable securities	30,162	81,131
Purchase of fixed assets	(3,491)	(5,215)
Purchase of intangible assets	0	(161)
Proceeds from divestiture of a business	8,283	0
(Increase) decrease in deposits	(7)	9
Net cash (used in) provided by investing activities	(6,973)	14,850
Cash flows from financing activities:
Issuance of common stock under stock plans	2	2
Treasury stock repurchases, including accelerated share repurchases	(31,137)	(150,039)
Tax withholding on restricted stock units	(18,718)	(19,007)
Repayment of long-term debt	0	(150,000)
Net cash used in financing activities	(49,853)	(319,044)
Effect of exchange rate changes on cash and cash equivalents	(1,293)	(9,253)
Net decrease in cash and cash equivalents	(106,850)	(315,836)
Cash and cash equivalents, beginning of period	386,794	636,161
Cash and cash equivalents, end of period	279,944	320,325
Supplemental disclosures:
Cash paid for interest	3,192	3,001
Cash paid for income taxes	41,250	30,134
Non-cash transactions:
Transfers of inventory to fixed assets	1,814	1,371
Additions to property, plant and equipment included in accounts payable	400	289
Issuance of common stock under employee stock plans	6,006	6,539
Unsettled share repurchases, included in accounts payable	$ 43	$ 0