Discontinued Operations (Income (Loss) From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0
Pretax income (loss) from operations	(3,146)	(6,632)	(6,272)	(9,567)
Income taxes (benefit)	(1,218)	(2,588)	(2,427)	(3,732)
Net income (loss) from discontinued operations	(1,928)	(4,044)	(3,845)	(5,835)
RSM And Related Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	(608)	(221)	(1,836)	307
Mortgage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	$ (2,538)	$ (6,411)	$ (4,436)	$ (9,874)