CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 127,629	$ 30,525	$ 76,602
Other comprehensive income:
Unrealized gain from derivative instrument	1,627	0	0
Loss on derivative instrument reclassified into earnings	152	0	0
Total comprehensive income	129,408	30,525	76,602
Comprehensive income attributable to noncontrolling interests – Operating Partnership	(12,888)	(4,059)	(7,032)
Net loss attributable to noncontrolling interests – consolidated real estate entities	1,861	16,881	2,436
Comprehensive income attributable to controlling interests	$ 118,381	$ 43,347	$ 72,006