Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Current assets:
Cash and cash equivalents	$ 386,794	$ 636,161
Marketable securities	32,204	67,037
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $675 and $1,649 at March 31, 2023 and 2022, respectively	143,855	148,245
Inventories and deferred costs	17,956	28,220
Prepaid income taxes	2,235	9,349
Prepaid expenses and other current assets	34,316	32,927
Total current assets	617,360	921,939
Fixed assets, net	34,735	41,337
Operating lease right-of-use assets	51,456	54,996
Goodwill	1,724,404	1,723,156
Intangible assets, net	366,591	433,419
Deferred income taxes	4,534	6,883
Long-term marketable securities	8,940	0
Other assets	12,540	12,979
Total assets	2,820,560	3,194,709
Current liabilities:
Accounts payable	16,473	21,959
Accrued compensation	83,279	75,788
Accrued other	26,283	32,064
Income taxes payable	4,391	4,353
Deferred revenue and customer deposits	311,531	330,585
Current portion of operating lease liabilities	11,650	11,411
Total current liabilities	453,607	476,160
Other long-term liabilities	7,683	7,470
Deferred tax liability	24,939	78,899
Accrued long-term retirement benefits	26,049	34,737
Long-term deferred revenue and customer deposits	129,814	133,121
Operating lease liabilities, net of current portion	48,819	53,927
Long-term debt	100,000	350,000
Total liabilities	790,911	1,134,314
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at March 31, 2023 and 2022	0	0
Common stock, $0.001 par value: 300,000,000 shares authorized; 128,683,824 and 126,425,383 shares issued and 71,249,045 and 74,102,293 shares outstanding at March 31, 2023 and 2022, respectively	128	126
Additional paid-in capital	3,099,698	3,023,403
Accumulated other comprehensive income	5,738	141
Treasury stock at cost, 57,434,779 and 52,323,090 shares at March 31, 2023 and 2022, respectively	(1,546,128)	(1,373,840)
Retained earnings	470,213	410,565
Total stockholders' equity	2,029,649	2,060,395
Total liabilities and stockholders' equity	$ 2,820,560	$ 3,194,709