Consolidated Statements Of Operations And Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
REVENUES:
Service revenues	$ 148,871	$ 140,854	$ 294,054	$ 278,656
OPERATING EXPENSES:
Costs of revenues	250,815	240,019	472,375	467,734
Selling, general and administrative	113,319	116,846	219,059	212,095
Total operating expenses	364,134	356,865	691,434	679,829
Other income (expense), net	4,464	1,011	9,006	2,231
Interest expense on borrowings	(21,191)	(21,265)	(42,381)	(42,542)
Loss from continuing operations before income tax benefit	(231,990)	(236,265)	(430,755)	(441,484)
Income tax benefit	(61,053)	(87,953)	(111,021)	(165,354)
Net loss from continuing operations	(170,937)	(148,312)	(319,734)	(276,130)
Net loss from discontinued operations, net of tax benefits of $1,607, $3,067, $2,769 and $4,672	(5,339)	(5,254)	(9,212)	(8,003)
Net loss	$ (176,276)	$ (153,566)	$ (328,946)	$ (284,133)
BASIC AND DILUTED LOSS PER SHARE:
Continuing operations (in usd per share)	$ (0.83)	$ (0.71)	$ (1.55)	$ (1.33)
Discontinued operations (in usd per share)	(0.03)	(0.03)	(0.04)	(0.03)
Consolidated (in usd per share)	(0.86)	(0.74)	(1.59)	(1.36)
DIVIDENDS PAID PER SHARE (in usd per share)	$ 0.25	$ 0.24	$ 0.50	$ 0.48
COMPREHENSIVE LOSS:
Net loss	$ (176,276)	$ (153,566)	$ (328,946)	$ (284,133)
Unrealized gains (losses) on securities, net of taxes	(3)	(1)	0	1
Change in foreign currency translation adjustments	(2,843)	(1,384)	(4,577)	1,076
Other comprehensive income (loss)	(2,846)	(1,385)	(4,577)	1,077
Comprehensive loss	(179,122)	(154,951)	(333,523)	(283,056)
Service revenues
REVENUES:
Service revenues	127,267	127,923	254,127	252,618
Royalty, product and other revenues
REVENUES:
Service revenues	$ 21,604	$ 12,931	$ 39,927	$ 26,038