Condensed Consolidating Financial Statements Condensed Consolidating Financial Statements (Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 134,340	$ 137,263	$ 261,535	$ 233,752
Cost of revenues	220,864	212,011	430,917	405,435
Selling, general and administrative	94,092	90,327	190,789	165,805
Total expenses	314,956	302,338	621,706	571,240
Operating loss	(180,616)	(165,075)	(360,171)	(337,488)
Other income (expense), net	1,254	2,787	(3,685)	5,931
Loss from continuing operations before income tax benefit	(179,362)	(162,288)	(363,856)	(331,557)
Income tax benefit	(76,347)	(61,089)	(147,571)	(124,708)
Net loss from continuing operations	(103,015)	(101,199)	(216,285)	(206,849)
Net loss from discontinued operations	(1,928)	(4,044)	(3,845)	(5,835)
NET LOSS	(104,943)	(105,243)	(220,130)	(212,684)
Other comprehensive income (loss)	1,720	1,335	(9,087)	(3,460)
Comprehensive loss	(103,223)	(103,908)	(229,217)	(216,144)
Block Financial Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	21,170	17,986	48,385	39,915
Cost of revenues	26,932	33,871	66,291	68,813
Selling, general and administrative	1,369	7,321	15,407	14,961
Total expenses	28,301	41,192	81,698	83,774
Operating loss	(7,131)	(23,206)	(33,313)	(43,859)
Other income (expense), net	1,662	1,186	1,706	2,510
Loss from continuing operations before income tax benefit	(5,469)	(22,020)	(31,607)	(41,349)
Income tax benefit	(2,203)	(6,703)	(11,601)	(14,958)
Net loss from continuing operations	(3,266)	(15,317)	(20,006)	(26,391)
Net loss from discontinued operations	(1,553)	(3,909)	(2,716)	(6,020)
NET LOSS	(4,819)	(19,226)	(22,722)	(32,411)
Other comprehensive income (loss)	1,108	119	(6,616)	254
Comprehensive loss	(3,711)	(19,107)	(29,338)	(32,157)
Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	113,204	119,299	213,340	193,915
Cost of revenues	193,966	178,162	364,816	336,700
Selling, general and administrative	92,723	83,006	175,382	150,844
Total expenses	286,689	261,168	540,198	487,544
Operating loss	(173,485)	(141,869)	(326,858)	(293,629)
Other income (expense), net	(408)	1,601	(5,391)	3,421
Loss from continuing operations before income tax benefit	(173,893)	(140,268)	(332,249)	(290,208)
Income tax benefit	(74,144)	(54,386)	(135,970)	(109,750)
Net loss from continuing operations	(99,749)	(85,882)	(196,279)	(180,458)
Net loss from discontinued operations	(375)	(135)	(1,129)	185
NET LOSS	(100,124)	(86,017)	(197,408)	(180,273)
Other comprehensive income (loss)	612	1,216	(2,471)	(3,714)
Comprehensive loss	(99,512)	(84,801)	(199,879)	(183,987)
Intersegment Elimination [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	(34)	(22)	(190)	(78)
Cost of revenues	(34)	(22)	(190)	(78)
Selling, general and administrative
Total expenses	(34)	(22)	(190)	(78)
Operating loss
Other income (expense), net	179,362	162,288	363,856	331,557
Loss from continuing operations before income tax benefit	179,362	162,288	363,856	331,557
Income tax benefit	76,347	61,089	147,571	124,708
Net loss from continuing operations	103,015	101,199	216,285	206,849
Net loss from discontinued operations	1,928	4,044	3,845	5,835
NET LOSS	104,943	105,243	220,130	212,684
Other comprehensive income (loss)	(1,720)	(1,335)	9,087	3,460
Comprehensive loss	103,223	103,908	229,217	216,144
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues
Cost of revenues
Selling, general and administrative
Total expenses
Operating loss
Other income (expense), net	(179,362)	(162,288)	(363,856)	(331,557)
Loss from continuing operations before income tax benefit	(179,362)	(162,288)	(363,856)	(331,557)
Income tax benefit	(76,347)	(61,089)	(147,571)	(124,708)
Net loss from continuing operations	(103,015)	(101,199)	(216,285)	(206,849)
Net loss from discontinued operations	(1,928)	(4,044)	(3,845)	(5,835)
NET LOSS	(104,943)	(105,243)	(220,130)	(212,684)
Other comprehensive income (loss)	1,720	1,335	(9,087)	(3,460)
Comprehensive loss	$ (103,223)	$ (103,908)	$ (229,217)	$ (216,144)