Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 331,912	$ 304,880
Marketable securities	47,895	137,892
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $1,675 and $2,066 at December 31, 2017 and March 31, 2017, respectively	249,939	294,374
Inventories and deferred costs	36,592	40,002
Prepaid income taxes	23,483	40,346
Prepaid expenses and other current assets (related party balances of $3,082 and $3,585 at December 31, 2017 and March 31, 2017, respectively)	23,686	36,972
Total current assets	713,507	854,466
Fixed assets, net	53,646	61,393
Goodwill	1,716,371	1,718,162
Intangible assets, net	859,160	931,269
Deferred income taxes	5,725	6,580
Long-term marketable securities	3,187	21,933
Other assets	7,423	7,710
Total assets	3,359,019	3,601,513
Current liabilities:
Accounts payable (related party balances of $362 and $444 at December 31, 2017 and March 31, 2017, respectively)	32,469	37,407
Accrued compensation	54,010	77,607
Accrued other	30,335	29,522
Income taxes payable	3,240	5,057
Deferred revenue and customer deposits	299,271	310,594
Total current liabilities	419,325	460,187
Other long-term liabilities	7,412	3,976
Deferred tax liability	177,598	277,599
Accrued long-term retirement benefits	35,589	32,117
Long-term deferred revenue and customer deposits	87,747	86,595
Long-term debt	300,000	300,000
Contingent liabilities	0	4,789
Total liabilities	1,027,671	1,165,263
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized; no shares issued or outstanding at December 31, 2017 and March 31, 2017	0	0
Common stock, $0.001 par value, 300,000,000 shares authorized; 117,331,491 and 115,917,431 shares issued and 87,267,106 and 92,041,288 shares outstanding at December 31, 2017 and March 31, 2017, respectively	117	116
Additional paid-in capital	2,735,387	2,693,846
Accumulated other comprehensive income (loss)	46	(3,472)
Treasury stock at cost, 30,064,385 and 23,876,143 shares at December 31, 2017 and March 31, 2017, respectively	(783,878)	(570,921)
Retained earnings	379,676	316,681
Total stockholders' equity	2,331,348	2,436,250
Total liabilities and stockholders' equity	$ 3,359,019	$ 3,601,513

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.