XML 60 R50.htm IDEA: XBRL DOCUMENT
v3.25.1

Net Investment in Sales-type Leases and Ground Lease Receivables - Interest Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Lessor, Lease, Description [Line Items] |  |
Cash | $ 45,275 | $ 41,361
Non-cash | 24,389 | 21,857
Total interest income from sales-type leases | 69,664 | 63,218
Net Investment in Sales-type Leases |  |
Lessor, Lease, Description [Line Items] |  |
Cash | 28,903 | 27,270
Non-cash | 15,815 | 14,927
Total interest income from sales-type leases | 44,718 | 42,197
Ground Lease Receivables |  |
Lessor, Lease, Description [Line Items] |  |
Cash | 16,372 | 14,091
Non-cash | 8,574 | 6,930
Total interest income from sales-type leases | $ 24,946 | $ 21,021

X
- Definition Amount of interest income from net investment in sales-type lease received in cash. + References No definition available. + Details
Name: | safe_SalesTypeLeaseInterestIncomeCash
Namespace Prefix: | safe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of interest income from net investment in sales-type lease received in payment other than cash. + References No definition available. + Details
Name: | safe_SalesTypeLeaseInterestIncomeNonCash
Namespace Prefix: | safe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-3 + Details
Name: | us-gaap_LessorLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of interest income from net investment in sales-type lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479773/842-30-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 25 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479341/842-30-25-2 + Details
Name: | us-gaap_SalesTypeLeaseInterestIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=safe_NetInvestmentinSalestypeLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=safe_GroundLeaseReceivablesNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |