Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2018	Apr. 30, 2018	Oct. 31, 2017
ASSETS
Cash and cash equivalents	$ 600,799	$ 1,544,944	$ 180,997
Cash and cash equivalents - restricted	122,507	118,734	100,665
Receivables, less allowance for doubtful accounts of $65,409, $55,265 and $81,813	61,286	146,774	77,750
Income taxes receivable	18,745	12,310
Prepaid expenses and other current assets	87,665	68,951	85,204
Total current assets	891,002	1,891,713	444,616
Property and equipment, at cost, less accumulated depreciation and amortization of $787,978, $728,811 and $745,397	241,772	231,888	262,226
Intangible assets, net	364,524	373,981	406,440
Goodwill	507,191	507,871	493,059
Deferred tax assets and income taxes receivable	130,987	34,095	9,205
Other noncurrent assets	97,820	101,401	101,015
Total assets	2,233,296	3,140,949	1,716,561
LIABILITIES:
Accounts payable and accrued expenses	114,393	251,975	114,875
Accrued salaries, wages and payroll taxes	43,396	141,499	42,897
Accrued income taxes and reserves for uncertain tax positions	94,257	263,050	43,879
Current portion of long-term debt		1,026	1,004
Deferred revenue and other current liabilities	183,675	186,101	190,522
Total current liabilities	435,721	843,651	393,177
Long-term debt	1,491,328	1,494,609	1,493,828
Deferred tax liabilities and reserves for uncertain tax positions	235,799	229,430	138,024
Deferred revenue and other noncurrent liabilities	101,773	179,548	104,305
Total liabilities	2,264,621	2,747,238	2,129,334
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	759,235	760,250	753,423
Accumulated other comprehensive loss	(18,880)	(14,303)	(14,222)
Retained earnings (deficit)	(64,291)	362,980	(433,556)
Less treasury shares, at cost, of 36,499,002, 37,130,454 and 36,944,789	(709,809)	(717,678)	(720,880)
Total stockholders' equity (deficiency)	(31,325)	393,711	(412,773)
Total liabilities and stockholders' equity	$ 2,233,296	$ 3,140,949	$ 1,716,561