Fair Value of Financial Instruments (Details) - Fair Value, Inputs, Level 2	12 Months Ended
Dec. 31, 2014
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate used to estimate fair value of mortgages and notes payable (in percents)	3.62%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Interest rate used to estimate fair value of mortgages and notes payable (in percents)	5.73%

Risk-free interest rate assumption used in valuing an instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Data Type:	num:percentItemType
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Period Type:	duration