Discontinued Operations (Income (Loss) From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 417,168	$ 828,725	$ 859,869
Pretax income (loss) from operations	(45,261)	27,377	43,043
Income taxes (benefit)	(13,329)	13,814	18,924
Net income (loss) from operations	(31,932)	13,563	24,119
Pretax loss on sales of businesses	(109,719)
Income tax benefit	(61,615)
Net loss on sales of businesses	(48,104)
Net income (loss) from discontinued operations	(80,036)	13,563	24,119
RSM And Related Businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	14,441	48,021	59,492
Mortgage [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	$ (59,702)	$ (20,644)	$ (16,449)