v3.24.3

Business Description - Additional Information (Detail) | Sep. 30, 2024 Property
--- | ---
Business Description [Line Items] |
Number of leased commercial properties owned | 773
Number of States in which properties located | 44
Number of provinces | 773
UNITED STATES |
Business Description [Line Items] |
Number of leased commercial properties owned | 766
Canadian Provinces |
Business Description [Line Items] |
Number of leased commercial properties owned | 7
Number of provinces | 4

X
- Definition Business description line items. + References No definition available. + Details
Name: | bnl_BusinessDescriptionLineItems
Namespace Prefix: | bnl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Provinces + References No definition available. + Details
Name: | bnl_NumberOfProvinces
Namespace Prefix: | bnl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_CA-BC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |