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

No definition available.

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- Definition

Interest rate 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column B
-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 B))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

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Balance Type:	na
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- Definition

Number of mortgage loans 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Footnote 3
-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(Footnote 3))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

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- 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

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Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 326
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-Paragraph 13
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-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of 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.

+ References

Reference 1: 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 G))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

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

- 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

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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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

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- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix:
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- Details

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

- Details

Name:	srt_MortgageLoansOnRealEstateLoanTypeAxis=ohi_MortgageNoteDue2029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=us-gaap_CommercialBorrowerMember
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Balance Type:
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- Details

Name:	srt_MortgageLoansOnRealEstateLoanTypeAxis=ohi_OneMortgageMember
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- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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MORTGAGE NOTES RECEIVABLE (Schedule of Receivables) (Detail)	12 Months Ended
	Dec. 31, 2019 USD ($) property contract facility	Dec. 31, 2018 USD ($) contract	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loss on other investments	$ (4,905,000)	$ (4,905,000)
Total mortgages - net	$ 773,563,000	710,858,000	$ 671,232,000	$ 639,343,000
Number of real estate properties \| facility	987
Mortgage Loans on Real Estate	$ 773,563,000	710,858,000	$ 671,232,000	$ 639,343,000
Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity year	2028
Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable	$ 778,468,000	715,763,000
Mortgage Receivable [Member] \| Mortgage Note Due 2027 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable	$ 112,500,000	112,500,000
Mortgage loans on real estate, interest rate	10.39%
Maturity year	2027
Mortgage Receivable [Member] \| Mortgage Note Due 2029 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable	$ 526,520,000	537,515,000
Mortgage loans on real estate, interest rate	10.08%
Maturity year	2029
Mortgage Receivable [Member] \| Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable	$ 139,448,000	$ 65,748,000
Weighted Average [Member] \| Other Mortgage Notes Member
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, interest rate	9.45%
Commercial Borrower [Member] \| Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans on real estate, number of loans \| contract	1	1
Commercial Borrower [Member] \| Mortgage Receivable [Member] \| One Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total mortgages - net	$ 1,500,000	$ 1,500,000
Mortgage Loans on Real Estate	$ 1,500,000	$ 1,500,000
Construction Loans [Member] \| Mortgage Receivable [Member] \| Mortgage Note Due 2029 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity year	2029
Construction Loans [Member] \| Mortgage Receivable [Member] \| 3 Mortgage Notes Due Through 2021 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage notes receivable	$ 36,200,000
Maturity year	2021
Mortgage loans on real estate, number of loans	3
Facilities Used in Weighted Average Interest Rate [Member] \| Mortgage Receivable [Member] \| Mortgage Note Due 2029 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of real estate properties \| property	36