Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (115,315)	$ 62,869
Adjustments to reconcile net income (loss) to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization	56,928	64,302
Operating lease right-of-use assets	7,857	7,984
Gain on divestiture of a business	(3,806)	0
Loss on disposal of fixed assets	299	47
Share-based compensation expense	54,653	47,225
Change in fair value of derivative investment	(206)	0
Goodwill impairment	167,106	0
Deferred income taxes	(35,530)	(38,435)
Other (gains) losses	(1,758)	9
Changes in assets and liabilities
Accounts receivable and unbilled costs	(77,787)	(67,101)
Inventories	(634)	8,323
Prepaid expenses and other assets	(6,583)	4,279
Accounts payable	(984)	(7,129)
Accrued compensation and other expenses	(46,170)	(7,804)
Operating lease liabilities	(8,970)	(9,061)
Income taxes payable	(2,631)	(2,675)
Deferred revenue	(21,236)	(18,910)
Net cash (used in) provided by operating activities	(34,767)	43,923
Cash flows from investing activities:
Purchase of marketable securities and investments	(43,159)	(100,265)
Proceeds from sales and maturity of marketable securities	53,569	103,152
Purchase of fixed assets	(4,740)	(8,381)
Purchase of intangible assets	0	(161)
Proceeds from divestiture of a business	7,766	0
(Increase) decrease in deposits	(7)	8
Net cash provided by (used in) investing activities	13,429	(5,647)
Cash flows from financing activities:
Issuance of common stock under stock plans	3	2
Treasury stock repurchases, including accelerated share repurchases	(50,000)	(150,039)
Tax withholding on restricted stock units	(19,151)	(19,187)
Repayment of long-term debt	0	(150,000)
Net cash used in financing activities	(69,148)	(319,224)
Effect of exchange rate changes on cash and cash equivalents	1,347	(3,169)
Net decrease in cash and cash equivalents	(89,139)	(284,117)
Cash and cash equivalents, beginning of period	386,794	636,161
Cash and cash equivalents, end of period	297,655	352,044
Supplemental disclosures:
Cash paid for interest	4,817	5,351
Cash paid for income taxes	54,481	47,294
Non-cash transactions:
Transfers of inventory to fixed assets	1,814	1,371
Additions to property, plant and equipment included in accounts payable	414	622
Issuance of common stock under employee stock plans	$ 6,006	$ 6,539