Related Party Transactions (Tables)

9 Months Ended

Jan. 31, 2013

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)	2013		2012		2013		2012
Non-voting revenues interest in EAM	$	1,472	$	1,430	$	4,280	$	4,251
Non-voting profits interest in EAM		153		26		347		120
	$	1,625	$	1,456	$	4,627	$	4,371