Recent Transactions (Acquisitions) (Narrative) (Details) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2017
USD ($)
property
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Real Estate Properties [Line Items] | |||
| Purchase price of property | $ 90,068 | $ 121,582 | $ 94,073 |
| Jersey City, Morris Township And Red Bank, New Jersey [Member] | |||
| Real Estate Properties [Line Items] | |||
| Number of real estate properties | property | 3 | ||
| Purchase price of property | $ 80,000 | ||