Federal, State and Local Income Taxes (Detail Textuals) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Income Tax Disclosure [Abstract]
Gain from deconsolidation of the company's asset management and mutual fund distribution subsidiaries	$ 50,510
Deferred non-cash postemployment compensation granted to VLI's former employee	$ 1,770
Effective income tax rate	30.52%	33.50%	37.00%