Condensed Consolidating Financial Statements (Income Statement) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 133,586	$ 127,195
Cost of revenues	211,521	210,053
Selling, general and administrative	97,200	96,697
Total expenses	308,721	306,750
Operating loss	(175,135)	(179,555)
Other income (expense), net (1)	(681)	(4,939)
Loss from continuing operations before income tax benefit	(175,816)	(184,494)
Income tax benefit	(66,965)	(71,224)
Net loss from continuing operations	(108,851)	(113,270)
Net loss from discontinued operations	(7,381)	(1,917)
NET LOSS	(116,232)	(115,187)
Other comprehensive loss	306	(10,807)
Comprehensive loss	(115,926)	(125,994)
Block Financial Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	23,860	27,215
Cost of revenues	25,501	39,359
Selling, general and administrative	3,343	14,038
Total expenses	28,844	53,397
Operating loss	(4,984)	(26,182)
Other income (expense), net (1)	(836)	44
Loss from continuing operations before income tax benefit	(5,820)	(26,138)
Income tax benefit	(2,643)	(9,398)
Net loss from continuing operations	(3,177)	(16,740)
Net loss from discontinued operations	(7,209)	(1,163)
NET LOSS	(10,386)	(17,903)
Other comprehensive loss	(121)	(7,724)
Comprehensive loss	(10,507)	(25,627)
Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	109,809	100,136
Cost of revenues	186,100	170,850
Selling, general and administrative	93,860	82,659
Total expenses	279,960	253,509
Operating loss	(170,151)	(153,373)
Other income (expense), net (1)	(1,071)	(4,983)
Loss from continuing operations before income tax benefit	(171,222)	(158,356)
Income tax benefit	(61,561)	(61,826)
Net loss from continuing operations	(109,661)	(96,530)
Net loss from discontinued operations	(172)	(754)
NET LOSS	(109,833)	(97,284)
Other comprehensive loss	306	(3,083)
Comprehensive loss	(109,527)	(100,367)
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 (1)	(118,993)	(115,187)
Loss from continuing operations before income tax benefit	(118,993)	(115,187)
Income tax benefit	(2,761)
Net loss from continuing operations	(116,232)	(115,187)
Net loss from discontinued operations	0
NET LOSS	(116,232)	(115,187)
Other comprehensive loss	306	(10,807)
Comprehensive loss	(115,926)	(125,994)
Intersegment Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	(83)	(156)
Cost of revenues	(80)	(156)
Selling, general and administrative	(3)
Total expenses	(83)	(156)
Operating loss
Other income (expense), net (1)	120,219	115,187
Loss from continuing operations before income tax benefit	120,219	115,187
Income tax benefit
Net loss from continuing operations	120,219	115,187
Net loss from discontinued operations
NET LOSS	120,219	115,187
Other comprehensive loss	(185)	10,807
Comprehensive loss	$ 120,034	$ 125,994