Assets and Liabilities Measured at Fair Value (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Assets measured at fair value on a recurring and nonrecurring basis
Impairment of Real Estate	$ 0	$ 0	$ 0	$ 0	$ 1,400,000
Recurring
Assets measured at fair value on a recurring and nonrecurring basis
Derivative financial instruments	$ 0		$ 0		2,000
Nonrecurring
Assets measured at fair value on a recurring and nonrecurring basis
Investment Buildings and Building Improvements, Net, Fair Value Disclosure					25,000,000
Level 1 | Recurring
Assets measured at fair value on a recurring and nonrecurring basis
Derivative financial instruments					0
Level 2 | Recurring
Assets measured at fair value on a recurring and nonrecurring basis
Derivative financial instruments					2,000
Level 3 | Recurring
Assets measured at fair value on a recurring and nonrecurring basis
Derivative financial instruments					$ 0
Level 3 | Nonrecurring | Investment Building and Building Improvements [Member] | Minimum [Member] | Income Approach Valuation Technique [Member]
Assets measured at fair value on a recurring and nonrecurring basis
Fair Value Inputs, Discount Rate					6.50%
Fair Value Inputs, Terminal Capitalization Rate					7.50%
Level 3 | Nonrecurring | Investment Building and Building Improvements [Member] | Maximum [Member] | Income Approach Valuation Technique [Member]
Assets measured at fair value on a recurring and nonrecurring basis
Fair Value Inputs, Discount Rate					7.50%
Fair Value Inputs, Terminal Capitalization Rate					8.00%