XML 62 R48.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value Measurements - Fair Value of Financial Instruments Presented at Carrying Values (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Carrying Value    
Debt Instrument [Line Items]    
Mortgages payable $ 370,029 $ 434,746
Line of credit and term loan 300,000 300,000
Estimated Fair Value    
Debt Instrument [Line Items]    
Mortgages payable 372,418 435,513
Line of credit and term loan $ 299,760 $ 299,741