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

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

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

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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.

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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Article 5

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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).

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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

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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.

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Segments - Net Income of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information
Rental revenues	$ 21,771	$ 21,303	$ 19,908	$ 18,190	$ 17,521	$ 16,713	$ 15,319	$ 15,193	$ 81,172	$ 64,746	$ 57,520
Rental expenses									19,204	16,667	14,025
Real estate taxes									7,782	5,743	5,124
Segment revenues	41,309	53,822	47,066	29,071	32,060	31,532	20,495	19,234	171,268	103,321	82,516
Segment expenses									165,344	98,754	78,813
Operating income	$ 15,819	$ 16,488	$ 15,101	$ 12,702	$ 12,685	$ 11,883	$ 11,212	$ 11,123	26,584	21,379	19,659
Office Real Estate
Segment Reporting Information
Rental revenues									31,534	27,827	25,794
Rental expenses									6,938	6,395	5,721
Real estate taxes									2,950	2,315	2,171
Retail Real Estate
Segment Reporting Information
Rental revenues									32,064	23,956	21,755
Rental expenses									5,915	5,011	4,808
Real estate taxes									2,928	2,097	1,971
Multifamily Residential Real Estate
Segment Reporting Information
Rental revenues									17,574	12,963	9,971
Rental expenses									6,351	5,261	3,496
Real estate taxes									1,904	1,331	982
General Contracting And Real Estate Services
Segment Reporting Information
Segment revenues									171,268	103,321	82,516
Segment expenses									165,344	98,754	78,813
Operating Segments
Segment Reporting Information
Operating income									60,110	46,903	42,074
Operating Segments \| Office Real Estate
Segment Reporting Information
Operating income									21,646	19,117	17,902
Operating Segments \| Retail Real Estate
Segment Reporting Information
Operating income									23,221	16,848	14,976
Operating Segments \| Multifamily Residential Real Estate
Segment Reporting Information
Operating income									9,319	6,371	5,493
Operating Segments \| General Contracting And Real Estate Services
Segment Reporting Information
Operating income									$ 5,924	$ 4,567	$ 3,703