Related Party Transactions (Tables)

9 Months Ended

Jan. 31, 2016

Related Party Transactions [Abstract]

Schedule of non voting revenues interest and non voting profits interests

	Three Months Ended January 31,				Nine Months Ended January 31,
($ in thousands)	2016		2015		2016		2015
Non-voting revenues interest in EAM	$	1,825	$	1,862	$	5,546	$	5,498
Non-voting profits interest in EAM		94		162		355		497
	$	1,919	$	2,024	$	5,901	$	5,995