Revenue Recognition - Schedule of Fee and Other Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	$ 14,398	$ 6,501	$ 30,983	$ 14,044
Other property income:
Other	1,985	1,913	4,201	3,672
Total fee and other income	16,383	8,414	35,184	17,716
Asset and Property Management Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	11,110	4,886	22,641	10,482
Leasing Commissions [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	1,381	1,312	2,880	2,934
Development Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	392	303	945	628
Disposition Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	1,515	0	2,717	0
Credit Facility Guaranty and Refinancing Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	$ 0	$ 0	$ 1,800	$ 0