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Unsecured Lines of Credit Payable - Line of Credit Facility, Increase (decrease), net (Details)

v3.7.0.1
Unsecured Lines of Credit Payable - Line of Credit Facility, Increase (decrease), net (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]  
Balance at December 31, 2016 $ 120,000
Balance at March 31, 2017 123,000
Revolving Credit Facility | Line of Credit  
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]  
Balance at December 31, 2016 120,000
Borrowings 90,000
Repayments (87,000)
Balance at March 31, 2017 $ 123,000