Represents stated maturity year of the mortgage loan receivable on real estate.

No definition available.

Name:	ohi_MortgageLoansOnRealEstateFinalMaturityYear
Namespace Prefix:	ohi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Mortgage receivable extension option period.

+ References

No definition available.

+ Details

Name:	ohi_MortgageReceivableExtensionOptionPeriod
Namespace Prefix:	ohi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Maturity date of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column C
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column C))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	srt_MortgageLoanOnRealEstateFinalMaturityDate
Namespace Prefix:	srt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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

No definition available.

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before allowance for credit loss, of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ohi_SkilledNursingFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ohi_AssistedLivingFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ohi_PropertyCategoryAxis=ohi_FacilitiesCoveredByMortgageAndUsedAsCollateralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_OH
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateLoanTypeAxis=ohi_MortgageNoteDue2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ohi_SevenSeniorNursingFacilitiesAndTwoAssistedLivingFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=ohi_TrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=ohi_TrancheTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GeographicDistributionAxis=stpr_PA
Namespace Prefix:
Data Type:	na
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MORTGAGE NOTES RECEIVABLE (Notes Due 2027 Narrative) (Detail) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2019 USD ($) facility	Dec. 31, 2018 USD ($) facility	Jan. 17, 2014 USD ($) facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties		987
Skilled Nursing Facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties		784	12
Assisted Living Facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties		114
Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable \| $		$ 778,468	$ 715,763
Facilities Covered by Mortgage and Used as Collateral [Member] \| Mortgage Receivable [Member] \| Ohio \| Assisted Living Facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties				2
Mortgage Note Due 2027 [Member] \| Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable \| $		$ 112,500	$ 112,500
Maturity year		2027
Mortgage Note Due 2027 [Member] \| Mortgage Receivable [Member] \| 7 SNFs and 2 ALFs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable \| $				$ 112,500
Mortgage loans on real estate, maturity date	Jan. 31, 2027
Mortgage receivable extension option period		5 years
Mortgage Note Due 2027 [Member] \| Mortgage Receivable [Member] \| Tranche One [Member] \| 7 SNFs and 2 ALFs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, maturity date	Jan. 31, 2032
Mortgage Note Due 2027 [Member] \| Mortgage Receivable [Member] \| Tranche Two [Member] \| 7 SNFs and 2 ALFs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, maturity date	Sep. 30, 2034
Mortgage Note Due 2027 [Member] \| Facilities Covered by Mortgage and Used as Collateral [Member] \| Mortgage Receivable [Member] \| Pennsylvania \| Skilled Nursing Facilities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties				7