Related Party Transactions (Tables)

6 Months Ended

Oct. 31, 2013

Related Party Transactions [Abstract]

Schedule of non voting revenues interest and non voting profits interests

	Three Months Ended October 31,				Six Months Ended October 31,
($ in thousands)	2013		2012		2013		2012
Non-voting revenues interest in EAM	$	1,663	$	1,414	$	3,261	$	2,808
Non-voting profits interest in EAM		191		115		362		194
	$	1,854	$	1,529	$	3,623	$	3,002