Fair Value Measurements (Assets Measured and Recorded as Fair Value on a Nonrecurring Basis) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment loss on goodwill and income producing properties		$ 11,307,000
Fair Value, Inputs, Level 3 [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Discount Rate			12.50%
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Terminal cap rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Cap Rate			10.50%
Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Overall cap rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Inputs, Cap Rate			10.00%
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating Properties Held-for-investment, Fair Value Disclosure			$ 700,000
Development Properties Held-for-investment			8,550,000
Assets, Fair Value Disclosure			9,250,000
Impairment loss			1,579,000
Impairment of Real Estate			3,667,000
Impairment loss on goodwill and income producing properties			5,246,000
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating Properties Held-for-investment, Fair Value Disclosure			0
Development Properties Held-for-investment			0
Assets, Fair Value Disclosure			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating Properties Held-for-investment, Fair Value Disclosure			0
Development Properties Held-for-investment			0
Assets, Fair Value Disclosure			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Operating Properties Held-for-investment, Fair Value Disclosure			700,000
Development Properties Held-for-investment			8,550,000
Assets, Fair Value Disclosure			9,250,000
Continuing Operations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Long-Lived Assets Sold			$ 11,300,000
Goodwill, Impairment Loss	$ 200,000