Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023
Current assets:
Cash and cash equivalents	$ 279,944	$ 386,794
Marketable securities and investments	48,652	32,204
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $666 and $675 at September 30, 2023 and March 31, 2023, respectively	152,603	143,855
Inventories and deferred costs	15,909	17,956
Prepaid income taxes	13,619	2,235
Prepaid expenses and other current assets	29,794	34,316
Total current assets	540,521	617,360
Fixed assets, net	30,637	34,735
Operating lease right-of-use assets	47,000	51,456
Goodwill	1,722,004	1,724,404
Intangible assets, net	336,445	366,591
Deferred income taxes	4,468	4,534
Long-term marketable securities	3,959	8,940
Other assets	12,677	12,540
Total assets	2,697,711	2,820,560
Current liabilities:
Accounts payable	15,569	16,473
Accrued compensation	36,935	83,279
Accrued other	18,337	26,283
Income taxes payable	1,604	4,391
Deferred revenue and customer deposits	275,008	311,531
Current portion of operating lease liabilities	11,671	11,650
Total current liabilities	359,124	453,607
Other long-term liabilities	7,371	7,683
Deferred tax liability	3,224	24,939
Accrued long-term retirement benefits	25,363	26,049
Long-term deferred revenue and customer deposits	119,305	129,814
Operating lease liabilities, net of current portion	43,654	48,819
Long-term debt	100,000	100,000
Total liabilities	658,041	790,911
Commitments and contingencies (Note 14)
Preferred stock, $0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at September 30, 2023 and March 31, 2023	0	0
Common stock, $0.001 par value:
300,000,000 shares authorized; 130,875,398 and 128,683,824 shares issued and 71,697,901 and 71,249,045 shares outstanding at September 30, 2023 and March 31, 2023, respectively	130	128
Additional paid-in capital	3,142,712	3,099,698
Accumulated other comprehensive income	5,379	5,738
Treasury stock at cost, 59,177,497 and 57,434,779 shares at September 30, 2023 and March 31, 2023, respectively	(1,596,026)	(1,546,128)
Retained earnings	487,475	470,213
Total stockholders' equity	2,039,670	2,029,649
Total liabilities and stockholders' equity	$ 2,697,711	$ 2,820,560