Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2018	Apr. 30, 2018	Jul. 31, 2017
ASSETS
Cash and cash equivalents	$ 979,116	$ 1,544,944	$ 551,566
Cash and cash equivalents - restricted	131,376	118,734	116,594
Receivables, less allowance for doubtful accounts of $65,445, $54,924 and $81,813	70,576	146,774	91,004
Income taxes receivable	15,776	12,310
Prepaid expenses and other current assets	85,279	68,951	74,776
Total current assets	1,282,123	1,891,713	833,940
Property and equipment, at cost, less accumulated depreciation and amortization of $768,302, $706,687 and $745,397	227,003	231,888	253,255
Intangible assets, net	354,831	373,981	393,972
Goodwill	507,941	507,871	493,991
Deferred tax assets and income taxes receivable	131,683	34,095	54,348
Other noncurrent assets	101,457	101,401	102,742
Total assets	2,605,038	3,140,949	2,132,248
LIABILITIES:
Accounts payable and accrued expenses	145,471	251,975	161,751
Accrued salaries, wages and payroll taxes	37,468	141,499	35,063
Accrued income taxes and reserves for uncertain tax positions	178,313	263,050	176,909
Current portion of long-term debt	1,038	1,026	992
Deferred revenue and other current liabilities	201,706	186,101	187,791
Total current liabilities	563,996	843,651	562,506
Long-term debt	1,495,006	1,494,609	1,493,422
Deferred tax liabilities and reserves for uncertain tax positions	231,292	229,430	159,233
Deferred revenue and other noncurrent liabilities	122,735	179,548	131,415
Total liabilities	2,413,029	2,747,238	2,346,576
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Common stock, no par, stated value $.01 per share, 800,000,000 shares authorized, shares issued of 242,026,278, 246,198,878 and 246,198,878	2,420	2,462	2,462
Additional paid-in capital	752,109	760,250	746,761
Accumulated other comprehensive loss	(16,034)	(14,303)	(12,837)
Retained earnings (deficit)	163,567	362,980	(229,647)
Less treasury shares, at cost, of 36,517,685, 37,141,486 and 36,944,789	(710,053)	(717,678)	(721,067)
Total stockholders' equity (deficiency)	192,009	393,711	(214,328)
Total liabilities and stockholders' equity	$ 2,605,038	$ 3,140,949	$ 2,132,248

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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- 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.