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Revenue Recognition - Schedule of Revenue From Contracts With Customers Included in Fee and Other Income on Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	$ 6,501	$ 7,928	$ 14,044	$ 16,552
Other fee income:
Ancillary and other property income	4,817	4,660	9,160	8,992
Lease termination fees	2,695	630	3,216	808
Other	714	890	1,326	1,773
Total fee and other income	14,727	14,108	27,746	28,125
Asset and Property Management Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	4,886	6,017	10,482	12,190
Leasing Commissions [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	1,312	1,461	2,934	3,328
Development Fees [Member]
Disaggregation Of Revenue [Line Items]
Total revenue from contracts with customers	$ 303	$ 450	$ 628	$ 1,034

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Fee and other income including revenue from contracts with customers.

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All amounts that are due to the servicer of a financial asset, excluding contractually specified servicing fees and late fees.

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Amount of revenue and income classified as other.

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