Revenue Recognition (Details) - Managed REITs - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2017
Business Management and Incentive Fees
Business management fees as a percentage of transferred real estate assets			0.50%
Business management fees as a percentage of average invested capital below the threshold limit			0.70%
Maximum threshold amount for calculating the business management fees			$ 250,000
Business management fees as a percentage of average invested capital above the threshold limit			0.50%
Minimum threshold amount for calculating the business management fees			$ 250,000
Business management fees as a percent of average market capitalization below the threshold limit			0.70%
Business management fees as a percent of average market capitalization above the threshold limit			0.50%
Contingent incentive business management fee percentage			12.00%
Measurement period for calculating the annual incentive fee as of December 31, 2016	3 years	2 years
Measurement period for calculating the annual incentive fee after December 31, 2016			3 years