Name:	ck0001538990_AmountsOfInvestmentsInRealEstateAndFinancingReceivablesRollForward
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Gross amount of real estate investments sold and discontinued operations disposed of during the period.

No definition available.

Name:	ck0001538990_CostOfRealEstateSoldAndDiscontinuedOperationsDisposed
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Investment in loans and financing receivables.

No definition available.

Name:	ck0001538990_InvestmentInLoansAndFinancingReceivables
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Gross, before accumulated depreciation and amortization, investment in real estate, loans and direct financing receivables, lease intangibles, and real estate held-for-sale.

No definition available.

Name:	ck0001538990_InvestmentsInRealEstateAndFinancingReceivablesGross
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of principal collected on loans and direct financing receivables during the reporting period.

No definition available.

Name:	ck0001538990_LoansAndDirectFinancingReceivablesCollectionsOfPrincipal
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of net change in operating lease right-of-use assets during the period .

No definition available.

Name:	ck0001538990_NetChangeInOperatingLeaseRightOfUseAsset
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Net, after accumulated depreciation and amortization, and below market lease liabilities, investment in real estate, loans and direct financing receivables, lease intangibles, and real estate held-for-sale.

No definition available.

Name:	ck0001538990_NetInvestments
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	ck0001538990_NumberOfPropertyLocationsRollForward
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The number of real estate properties acquired during the period.

No definition available.

Name:	ck0001538990_NumberOfRealEstatePropertiesAcquired
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The aggregate number of real estate properties, ground leases and mortgages owned as of the balance sheet date.

No definition available.

Name:	ck0001538990_NumberOfRealEstatePropertiesGroundLeasesAndMortgages
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The number of additional real estate properties attributable to loans and direct financing receivables originated during the period.

No definition available.

Name:	ck0001538990_NumberOfRealEstatePropertiesSecuringAdditionsToFinancingReceivables
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of real estate properties sold during the period.

No definition available.

Name:	ck0001538990_NumberOfRealEstatePropertiesSold
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Other reductions in real estate and finance receivables during the period that are not separately disclosed.

No definition available.

Name:	ck0001538990_OtherReductionsInRealEstateAndFinanceReceivables
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions of and additions to real estate investments, including lease intangibles, during the period.

No definition available.

Name:	ck0001538990_RealEstateAcquisitionsAndAdditions
Namespace Prefix:	ck0001538990_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482130/360-10-45-4