Segments - Net Income of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information
Rental revenues	$ 23,283	$ 18,190
Rental expenses	5,329	4,760
Real estate taxes	2,349	1,657
Segment revenues	36,803	29,071
Segment expenses	35,037	28,142
Operating income	5,999	5,295
Office Real Estate
Segment Reporting Information
Rental revenues	5,521	7,703
Rental expenses	1,456	1,754
Real estate taxes	539	691
Retail Real Estate
Segment Reporting Information
Rental revenues	13,032	6,625
Rental expenses	2,336	1,399
Real estate taxes	1,284	566
Multifamily Residential Real Estate
Segment Reporting Information
Rental revenues	4,730	3,862
Rental expenses	1,537	1,607
Real estate taxes	526	400
Operating Segments
Segment Reporting Information
Operating income	17,371	12,702
Operating Segments \| Office Real Estate
Segment Reporting Information
Operating income	3,526	5,258
Operating Segments \| Retail Real Estate
Segment Reporting Information
Operating income	9,412	4,660
Operating Segments \| Multifamily Residential Real Estate
Segment Reporting Information
Operating income	2,667	1,855
Operating Segments \| General Contracting And Real Estate Services
Segment Reporting Information
Segment revenues	36,803	29,071
Segment expenses	35,037	28,142
Operating income	$ 1,766	$ 929

Amount of expense incurred related to general contracting and real estate services.

No definition available.

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- Definition

Amount of expense incurred and directly related to generating revenue from leased and rented property or equipment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(c))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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- Definition

The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707

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- Definition

The aggregate revenue from real estate operations during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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- Definition

A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35301-107843

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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