Discontinued Operations (Income (Loss) From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		$ 199,042		$ 365,928
Pretax income (loss) from operations	(6,632)	(13,397)	(9,567)	(8,920)
Income taxes (benefit)	(2,588)	(6,002)	(3,732)	(3,806)
Net income (loss) from operations	(4,044)	(7,395)	(5,835)	(5,114)
Pretax loss on sales of businesses		(9,552)		(109,249)
Income tax benefit		1,764		(39,709)
Net loss on sales of businesses		(11,316)		(69,540)
Net loss from discontinued operations	(4,044)	(18,711)	(5,835)	(74,654)
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	(221)	10,583	307	17,714
Mortgage [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	$ (6,411)	$ (23,980)	$ (9,874)	$ (26,634)