Discontinued Operations (Income (Loss) From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues									$ 0	$ 417,168	$ 828,725
Pretax income (loss) from operations									(50,872)	(45,261)	27,377
Income taxes (benefit)									(19,662)	(13,329)	13,814
Net income (loss) from operations									(31,210)	(31,932)	13,563
Pretax loss on sales of businesses									0	(109,719)	0
Income tax benefit									0	(61,615)	0
Net loss on sales of businesses									0	(48,104)	0
Net income (loss) from discontinued operations	(24,582)	(793)	(4,044)	(1,791)	(5,600)	218	(18,711)	(55,943)	(31,210)	(80,036)	13,563
RSM And Related Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations									1,205	14,441	48,021
Mortgage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations									$ (52,077)	$ (59,702)	$ (20,644)