| Property Portfolio - Summary of the carrying amount of intangible assets and liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | 
|---|---|---|
| Assets | ||
| Cost | $ 123,918 | $ 98,234 | 
| Accumulated Amortization | (35,958) | (24,899) | 
| Net | 87,960 | 73,335 | 
| Liabilities | ||
| Cost | 11,546 | 10,072 | 
| Accumulated Amortization | (3,213) | (1,850) | 
| Net | 8,333 | 8,222 | 
| In-place leases [Member] | ||
| Assets | ||
| Cost | 67,968 | 55,561 | 
| Accumulated Amortization | (21,131) | (14,592) | 
| Net | 46,837 | 40,969 | 
| Above Market Lease intangibles [Member] | ||
| Assets | ||
| Cost | 22,013 | 14,972 | 
| Accumulated Amortization | (5,704) | (4,023) | 
| Net | 16,309 | 10,949 | 
| Leasing Costs [Member] | ||
| Assets | ||
| Cost | 33,937 | 27,701 | 
| Accumulated Amortization | (9,123) | (6,284) | 
| Net | $ 24,814 | $ 21,417 | 
| X | ||||||||||
| 
- References No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount of accumulated amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount before amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life. No definition available. 
 | 
| X | ||||||||||
| 
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
 | 
| X | ||||||||||
| 
- References No definition available. 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 | 
| X | ||||||||||
| 
- Details 
 |