Quarterly report pursuant to Section 13 or 15(d)

Unsecured Line of Credit Payable - Borrowings and Repayments (Details)

v3.10.0.1
Unsecured Line of Credit Payable - Borrowings and Repayments (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]  
Balance at December 31, 2017 $ 166,000
Balance at September 30, 2018 183,000
Line of Credit | Credit facility 2018 [Member]  
Line of Credit Facility, Increase (Decrease) During the Period [Roll Forward]  
Balance at December 31, 2017 166,000
Borrowings 397,000
Repayments (380,000)
Balance at September 30, 2018 $ 183,000