Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Current assets:
Cash and cash equivalents	$ 320,325	$ 636,161
Marketable securities	46,806	67,037
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $1,903 and $1,649 at September 30, 2022 and March 31, 2022, respectively	139,126	148,245
Inventories and deferred costs	24,063	28,220
Prepaid income taxes	30,420	9,349
Prepaid expenses and other current assets	27,649	32,927
Total current assets	588,389	921,939
Fixed assets, net	38,752	41,337
Operating lease right-of-use assets	49,757	54,996
Goodwill	1,733,342	1,723,156
Intangible assets, net	393,650	433,419
Deferred income taxes	6,232	6,883
Other assets	11,931	12,979
Total assets	2,822,053	3,194,709
Current liabilities:
Accounts payable	21,474	21,959
Accrued compensation	55,385	75,788
Accrued other	26,972	32,064
Income taxes payable	574	4,353
Deferred revenue and customer deposits	287,328	330,585
Current portion of operating lease liabilities	10,463	11,411
Total current liabilities	402,196	476,160
Other long-term liabilities	7,468	7,470
Deferred tax liability	71,510	78,899
Accrued long-term retirement benefits	30,917	34,737
Long-term deferred revenue and customer deposits	123,477	133,121
Operating lease liabilities, net of current portion	48,839	53,927
Long-term debt	200,000	350,000
Total liabilities	884,407	1,134,314
Commitments and contingencies (Note 13)
Preferred stock, $0.001 par value:
5,000,000 shares authorized; no shares issued or outstanding at September 30, 2022 and March 31, 2022	0	0
Common stock, $0.001 par value:
300,000,000 shares authorized; 128,373,156 and 126,425,383 shares issued and 72,243,650 and 74,102,293 shares outstanding at September 30, 2022 and March 31, 2022, respectively	128	126
Additional paid-in capital	3,015,644	3,023,403
Accumulated other comprehensive income (loss)	(1,056)	141
Treasury stock at cost, 56,129,506 and 52,323,090 shares at September 30, 2022 and March 31, 2022, respectively	(1,497,886)	(1,373,840)
Retained earnings	420,816	410,565
Total stockholders' equity	1,937,646	2,060,395
Total liabilities and stockholders' equity	$ 2,822,053	$ 3,194,709