FAIR VALUE MEASUREMENTS: (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Real estate inventory	$ 73,906	$ 75,401
Real estate inventory, Impairment Loss Recorded	1,125	525	6,377
Investment assets Impairment Loss Recorded	386	45
Mortgage note receivable, Impairment Loss Recorded			450
Goodwill, Impairment Loss Recorded			3,893
Fair Value, Inputs, Level 1 [Member]
Real estate inventory	0	0	0
Investment assets	0	0
Mortgage note receivable			0
Goodwill			0
Fair Value, Inputs, Level 2 [Member]
Real estate inventory	0	0	0
Investment assets	0	0
Mortgage note receivable			0
Goodwill			0
Fair Value, Inputs, Level 3 [Member]
Real estate inventory	2,390	744	10,032
Investment assets	1,076	430
Mortgage note receivable			451
Goodwill			$ 0