Condensed Consolidating Financial Statements Condensed Consolidating Financial Statements (Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 127,195	$ 96,489
Cost of revenues	210,053	193,424
Selling, general and administrative	96,697	75,478
Total expenses	306,750	268,902
Operating loss	(179,555)	(172,413)
Other income (expense), net	(4,939)	3,144
Loss from continuing operations before income tax benefit	(184,494)	(169,269)
Income tax benefit	(71,224)	(63,619)
Net loss from continuing operations	(113,270)	(105,650)
Net loss from discontinued operations	(1,917)	(1,791)
NET LOSS	(115,187)	(107,441)
Other comprehensive income (loss)	(10,807)	(4,795)
Comprehensive loss	(125,994)	(112,236)
Block Financial Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	27,215	21,929
Cost of revenues	39,359	34,942
Selling, general and administrative	14,038	7,640
Total expenses	53,397	42,582
Operating loss	(26,182)	(20,653)
Other income (expense), net	44	1,324
Loss from continuing operations before income tax benefit	(26,138)	(19,329)
Income tax benefit	(9,398)	(8,255)
Net loss from continuing operations	(16,740)	(11,074)
Net loss from discontinued operations	(1,163)	(2,111)
NET LOSS	(17,903)	(13,185)
Other comprehensive income (loss)	(7,724)	135
Comprehensive loss	(25,627)	(13,050)
Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	100,136	74,616
Cost of revenues	170,850	158,538
Selling, general and administrative	82,659	67,838
Total expenses	253,509	226,376
Operating loss	(153,373)	(151,760)
Other income (expense), net	(4,983)	1,820
Loss from continuing operations before income tax benefit	(158,356)	(149,940)
Income tax benefit	(61,826)	(55,364)
Net loss from continuing operations	(96,530)	(94,576)
Net loss from discontinued operations	(754)	320
NET LOSS	(97,284)	(94,256)
Other comprehensive income (loss)	(3,083)	(4,930)
Comprehensive loss	(100,367)	(99,186)
Intersegment Elimination [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	(156)	(56)
Cost of revenues	(156)	(56)
Selling, general and administrative
Total expenses	(156)	(56)
Operating loss
Other income (expense), net	184,494	169,269
Loss from continuing operations before income tax benefit	184,494	169,269
Income tax benefit	71,224	63,619
Net loss from continuing operations	113,270	105,650
Net loss from discontinued operations	1,917	1,791
NET LOSS	115,187	107,441
Other comprehensive income (loss)	10,807	4,795
Comprehensive loss	125,994	112,236
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	(184,494)	(169,269)
Loss from continuing operations before income tax benefit	(184,494)	(169,269)
Income tax benefit	(71,224)	(63,619)
Net loss from continuing operations	(113,270)	(105,650)
Net loss from discontinued operations	(1,917)	(1,791)
NET LOSS	(115,187)	(107,441)
Other comprehensive income (loss)	(10,807)	(4,795)
Comprehensive loss	$ (125,994)	$ (112,236)