Property acquisition (Details) $ in Thousands |
Dec. 07, 2017
USD ($)
|
|---|---|
| Real Estate [Line Items] | |
| Transaction costs | $ 19,600 |
| Building [Member] | |
| Real Estate [Line Items] | |
| Transaction costs | 10,800 |
| Land [Member] | |
| Real Estate [Line Items] | |
| Transaction costs | 8,800 |
| Provident Bank [Member] | |
| Real Estate [Line Items] | |
| Remaining balance (inclusive of the transaction costs) | $ 12,350 |
| Station Place on Monmouth, LLC [Member] | |
| Real Estate [Line Items] | |
| Percentage of acquisition | 100.00% |
| Acquisition costs | $ 19,550 |
| Transaction costs | 550 |
| Hammel Gardens Property [Member] | |
| Real Estate [Line Items] | |
| Net proceed from sales | $ 7,000 |