Investment in Real Estate Joint Ventures and Partnerships (Schedule of Combined Condensed Statements of Operations) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Equity Method Investments and Joint Ventures [Abstract]
Revenues, net	$ 36,587,000	$ 37,101,000	$ 73,705,000	$ 74,869,000
Expenses:
Depreciation and amortization	9,203,000	11,096,000	18,583,000	21,013,000
Interest, net	4,235,000	5,848,000	8,652,000	11,760,000
Operating	6,771,000	6,318,000	13,236,000	13,134,000
Real estate taxes, net	4,725,000	4,566,000	9,257,000	9,446,000
General and administrative	333,000	424,000	535,000	530,000
Provision for income taxes	43,000	216,000	111,000	283,000
Impairment loss	7,487,000	0	7,487,000	0
Total	32,797,000	28,468,000	57,861,000	56,166,000
Operating income	$ 3,790,000	$ 8,633,000	$ 15,844,000	$ 18,703,000