Purchase price of assets acquired.

No definition available.

Name:	ohi_PurchasePriceOfAssetsAcquired
Namespace Prefix:	ohi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from new investment.

+ 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(Footnote 6))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateNewMortgageLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- Definition

The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=ohi_MortgageLoansGuaranteedByUnitedStatesDepartmentOfHousingAndUrbanDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

PROPERTIES (Encore Portfolio) (Narrative) (Detail) $ in Thousands		12 Months Ended
	Oct. 31, 2019 USD ($) facility	Dec. 31, 2019 USD ($) facility	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Number of real estate properties \| facility		987
Purchase price of assets acquired	$ 757,000
Cash payment to acquire facilities	$ 369,000
Mortgage loans on real estate, new mortgage loans		$ 129,108	$ 65,841	$ 34,643
Facilities Acquired [Member]
Number of real estate properties \| facility	60
Mortgage Loans Guaranteed By United States Department of Housing and Urban Development [Member]
Mortgage loans on real estate, new mortgage loans	$ 389,000