Condensed Consolidating Financial Statements (Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 134,628	$ 134,340	$ 268,214	$ 261,535
Cost of revenues	221,697	207,063	419,423	403,313
Selling, general and administrative	97,379	94,092	194,579	190,789
Total operating expenses	319,076	301,155	614,002	594,102
Other income (expense), net (1)	(2,282)	1,254	(2,963)	(3,685)
Interest Expense, Debt	13,843	13,801	27,638	27,604
Loss from continuing operations before income tax benefit	(200,573)	(179,362)	(376,389)	(363,856)
Income tax benefit	(87,346)	(76,347)	(154,311)	(147,571)
Net loss from continuing operations	(113,227)	(103,015)	(222,078)	(216,285)
Net loss from discontinued operations	1,229	(1,928)	(6,152)	(3,845)
NET LOSS	(111,998)	(104,943)	(228,230)	(220,130)
Other comprehensive loss	1,094	1,720	1,400	(9,087)
Comprehensive loss	(110,904)	(103,223)	(226,830)	(229,217)
Block Financial Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	20,891	21,170	44,751	48,385
Cost of revenues	10,851	13,240	22,658	38,906
Selling, general and administrative	5,854	1,369	9,197	15,407
Total operating expenses	16,705	14,609	31,855	54,313
Other income (expense), net (1)	2,232	1,662	1,396	1,706
Interest Expense, Debt	13,742	13,692	27,436	27,385
Loss from continuing operations before income tax benefit	(7,324)	(5,469)	(13,144)	(31,607)
Income tax benefit	(7,020)	(2,203)	(9,663)	(11,601)
Net loss from continuing operations	(304)	(3,266)	(3,481)	(20,006)
Net loss from discontinued operations	(1,634)	(1,553)	(8,843)	(2,716)
NET LOSS	(1,938)	(4,819)	(12,324)	(22,722)
Other comprehensive loss	4,382	1,108	4,261	(6,616)
Comprehensive loss	2,444	(3,711)	(8,063)	(29,338)
Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	113,747	113,204	223,556	213,340
Cost of revenues	210,854	193,857	396,853	364,597
Selling, general and administrative	91,527	92,723	185,387	175,382
Total operating expenses	302,381	286,580	582,240	539,979
Other income (expense), net (1)	(18,005)	(408)	(19,076)	(5,391)
Interest Expense, Debt	101	109	202	219
Loss from continuing operations before income tax benefit	(206,740)	(173,893)	(377,962)	(332,249)
Income tax benefit	(77,671)	(74,144)	(139,232)	(135,970)
Net loss from continuing operations	(129,069)	(99,749)	(238,730)	(196,279)
Net loss from discontinued operations	2,863	(375)	2,691	(1,129)
NET LOSS	(126,206)	(100,124)	(236,039)	(197,408)
Other comprehensive loss	1,094	612	1,400	(2,471)
Comprehensive loss	(125,112)	(99,512)	(234,639)	(199,879)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues
Cost of revenues
Selling, general and administrative
Total operating expenses
Other income (expense), net (1)	(114,653)	(104,943)	(233,646)	(220,130)
Interest Expense, Debt	0	0	0	0
Loss from continuing operations before income tax benefit	(114,653)	(104,943)	(233,646)	(220,130)
Income tax benefit	(2,655)		(5,416)
Net loss from continuing operations	(111,998)	(104,943)	(228,230)	(220,130)
Net loss from discontinued operations	0		0
NET LOSS	(111,998)	(104,943)	(228,230)	(220,130)
Other comprehensive loss	1,094	1,720	1,400	(9,087)
Comprehensive loss	(110,904)	(103,223)	(226,830)	(229,217)
Intersegment Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	(10)	(34)	(93)	(190)
Cost of revenues	(8)	(34)	(88)	(190)
Selling, general and administrative	(2)		(5)
Total operating expenses	(10)	(34)	(93)	(190)
Other income (expense), net (1)	128,144	104,943	248,363	220,130
Interest Expense, Debt	0	0	0	0
Loss from continuing operations before income tax benefit	128,144	104,943	248,363	220,130
Income tax benefit
Net loss from continuing operations	128,144	104,943	248,363	220,130
Net loss from discontinued operations
NET LOSS	128,144	104,943	248,363	220,130
Other comprehensive loss	(5,476)	(1,720)	(5,661)	9,087
Comprehensive loss	$ 122,668	$ 103,223	$ 242,702	$ 229,217