CONSOLIDATED STATEMENTS OF CASH FLOWS - Supplemental Disclosures - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH AND CASH EQUIVALENTS AND RESTRICTED DEPOSITS AT END OF PERIOD
Cash and cash equivalents	$ 9,972	$ 20,997
Restricted deposits	7,041	7,909
TOTAL CASH AND CASH EQUIVALENTS AND RESTRICTED DEPOSITS AT END OF PERIOD	17,013	28,906
SCHEDULE OF CASH FLOW INFORMATION
Cash paid during the period for interest, net of capitalized interest	4,508	4,627
SUPPLEMENTARY SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES
Dividends reinvested	1,374	1,252
Dividends declared and not paid	2,190	2,008
UPREIT distributions declared and not paid	4,473	4,232
Acquisition of assets in exchange for the issuance of noncontrolling interest units in UPREIT	1,546	6,760
Increase in land improvements due to increase in special assessments payable	246	48
Unrealized gain on interest rate swaps	13	24
Acquisition of assets through assumption of debt and liabilities	54
Capitalized interest and real estate taxes related to construction in progress	28	$ 37
Acquisition of assets with accounts payable	$ 575