Discontinued Operations (Income (Loss) From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
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	(3,124)	(1,276)	(9,396)	(10,843)
Income taxes (benefit)	(1,164)	(483)	(3,591)	(4,215)
Net income (loss) from discontinued operations	(1,960)	(793)	(5,805)	(6,628)
RSM And Related Businesses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	265	(511)	(1,571)	(204)
Mortgage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pretax income (loss) from operations	$ (3,389)	$ (765)	$ (7,825)	$ (10,639)