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Fair Value of Financial Instruments (Details Textual)
$ in Millions
6 Months Ended
Jun. 30, 2016
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Interest rate cash flow hedge reclassified as non-cash increase to interest expense in the next 12 months $ 2.5
Originated Mortgage Notes Payable  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Interest rate 3.70%
Minimum | Assumed Mortgage Notes Payable  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Interest rate 3.20%
Maximum | Assumed Mortgage Notes Payable  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Interest rate 3.80%
Weighted Average | Assumed Mortgage Notes Payable  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Interest rate 3.40%
Significant Other Observable Inputs (Level 2) | Senior Notes 2024  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair value of long term debt $ 246.0
Significant Other Observable Inputs (Level 2) | Senior Notes 2023  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair value of long term debt 266.9
Significant Unobservable Inputs (Level 3) | Assumed Mortgage Notes Payable  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair value of note payable 37.1
Significant Unobservable Inputs (Level 3) | Originated Mortgage Notes Payable  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Fair value of note payable $ 35.0