Impairment - Real Estate Investments (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Investments, Fair Value as of measurement date	$ 4,875,000		$ 19,805,000
Real Estate Investments, Impairment Charge	450,000	0	13,500,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Investments, Fair Value as of measurement date	4,875,000		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Investments, Fair Value as of measurement date	0		7,100,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Real Estate Investments, Fair Value as of measurement date	$ 0		$ 12,705,000