DEVELOPMENT	6 Months Ended
Jun. 30, 2018
DEVELOPMENT [Abstract]
Development	DEVELOPMENT For properties under development and value-add properties acquired in the development stage, costs associated with development (i.e., land, construction costs, interest expense, property taxes and other direct and indirect costs associated with development) are aggregated into the total capitalized costs of the property. Included in these costs are management’s estimates for the portions of internal costs (primarily personnel costs) deemed related to such development activities. The internal costs are allocated to specific development properties based on development activity. As the property becomes occupied, depreciation commences on the occupied portion of the building, and costs are capitalized only for the portion of the building that remains vacant. Effective January 1, 2018, the Company began transferring properties from the development program to Real estate properties at the earlier of 90% occupancy or one year after completion of the shell construction (formerly, the Company transferred at the earlier of 80% occupancy or one year after completion of the shell construction). This change did not materially impact the comparability of the Company's financial statements. Upon transfer, capitalization of development costs, including interest expense, property taxes and internal personnel costs, ceases and depreciation commences on the entire property (excluding the land).

DEVELOPMENT

For properties under development and value-add properties acquired in the development stage, costs associated with development (i.e., land, construction costs, interest expense, property taxes and other direct and indirect costs associated with development) are aggregated into the total capitalized costs of the property. Included in these costs are management’s estimates for the portions of internal costs (primarily personnel costs) deemed related to such development activities. The internal costs are allocated to specific development properties based on development activity. As the property becomes occupied, depreciation commences on the occupied portion of the building, and costs are capitalized only for the portion of the building that remains vacant. Effective January 1, 2018, the Company began transferring properties from the development program to Real estate properties at the earlier of 90% occupancy or one year after completion of the shell construction (formerly, the Company transferred at the earlier of 80% occupancy or one year after completion of the shell construction). This change did not materially impact the comparability of the Company's financial statements. Upon transfer, capitalization of development costs, including interest expense, property taxes and internal personnel costs, ceases and depreciation commences on the entire property (excluding the land).