v3.24.3

Investment in Rental Property and Lease Arrangements - Summary of Amounts Reported as Lease Revenues Net on the Condensed Consolidated Statements of Income and Comprehensive Income (Loss) (Parenthetical) - (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2023 USD ($)
Leases [Abstract] |
Lease termination fee income | $ 7.5
Proceeds from sale of property | $ 32.0

X
- Definition Proceeds from sale of property. + References No definition available. + Details
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Namespace Prefix: | bnl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479092/842-20-40-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration