Consolidated Statements Of Operations And Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
REVENUES:
Service revenues	$ 126,860	$ 124,695
Royalty, product and other revenues	18,323	13,107
Total revenues	145,183	137,802
OPERATING EXPENSES:
Cost of revenues	221,560	227,715
Selling, general and administrative	105,740	95,249
Total operating expenses	327,300	322,964
Other income (expense), net	4,542	1,220
Interest expense on borrowings	(21,190)	(21,277)
Loss from continuing operations before income tax benefit	(198,765)	(205,219)
Income tax benefit	(49,968)	(77,401)
Net loss from continuing operations	(148,797)	(127,818)
Net loss from discontinued operations, net of tax benefits of $1,162 and $1,605	(3,873)	(2,749)
Net loss	$ (152,670)	$ (130,567)
BASIC AND DILUTED LOSS PER SHARE:
Continuing operations (in usd per share)	$ (0.72)	$ (0.62)
Discontinued operations (in usd per share)	(0.02)	(0.01)
Consolidated (in usd per share)	(0.74)	(0.63)
DIVIDENDS PAID PER SHARE (in usd per share)	$ 0.25	$ 0.24
COMPREHENSIVE LOSS:
Net loss	$ (152,670)	$ (130,567)
Unrealized gains on securities, net of taxes:
Unrealized holding gains arising during the period, net of taxes of $1 and $ -	3	2
Change in foreign currency translation adjustments	(1,734)	2,460
Other comprehensive income (loss)	(1,731)	2,462
Comprehensive loss	$ (154,401)	$ (128,105)