Amortization of below market leases.

No definition available.

Name:	ohi_AmortizationOfBelowMarketLeases
Namespace Prefix:	ohi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amortization of debt fair value adjustment, per year.

+ References

No definition available.

+ Details

Name:	ohi_AmortizationOfDebtFairValueAdjustment
Namespace Prefix:	ohi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents amortization period of above market leases

+ References

No definition available.

+ Details

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

- Definition

Annualized lease revenue amount.

+ References

No definition available.

+ Details

Name:	ohi_AnnualizedLeaseRevenue
Namespace Prefix:	ohi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash paid to transfer escrow accounts as part of a business acquisition.

+ References

No definition available.

+ Details

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

- Definition

The amount of acquisition cost of a business combination allocated to existing leases that are valued below market.

+ References

No definition available.

+ Details

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

- Definition

Represents assumed indebtedness for facilities purchased.

+ References

No definition available.

+ Details

Name:	ohi_CostOfFacilitiesPurchasedAssumedIndebtedness
Namespace Prefix:	ohi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents fair value adjustment on debt instrument.

+ References

No definition available.

+ Details

Name:	ohi_DebtInstrumentFairValueAdjustment
Namespace Prefix:	ohi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represent amount of fair value adjustments related to market debt.

+ References

No definition available.

+ Details

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

- Definition

Date when the long-term borrowing is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.).

+ References

No definition available.

+ Details

Name:	ohi_LongTermBorrowingMaturity
Namespace Prefix:	ohi_
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of leases in triple net lease agreements. The leases acquired is segregated into an above - and below-market component.

+ References

No definition available.

+ Details

Name:	ohi_NumberOfLeasesInTripleNetLease
Namespace Prefix:	ohi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of beds operating in the long-term facility, available for lease.

+ References

No definition available.

+ Details

Name:	ohi_NumberOfOperatingBeds
Namespace Prefix:	ohi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of third party tenants, mortgages and their affiliates who manage and/or operate the entity's properties.

+ References

No definition available.

+ Details

Name:	ohi_NumberOfOperators
Namespace Prefix:	ohi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of real estate properties under agreements to acquire.

+ References

No definition available.

+ Details

Name:	ohi_NumberOfRealEstatePropertiesUnderAgreementsToAcquire
Namespace Prefix:	ohi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of cash paid to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

+ Details

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

- Definition

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 99-12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

- Definition

The amount of acquisition cost of a business combination allocated to assets acquired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 37

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

- Definition

The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 37

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

+ Details

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

- Definition

Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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

- Definition

Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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

- Definition

Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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

- Definition

Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

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

- Details

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

- Definition

Number of shares of stock issued during the period pursuant to acquisitions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 53

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

PROPERTIES - 2009 - 2010 Acquisitions - 143 Facility CapitalSource Acquisitions - HUD Portfolio Closing (Narrative) (Detail 10) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				1 Months Ended	12 Months Ended								1 Months Ended
	Dec. 31, 2010	Dec. 31, 2012 State Operator	Jun. 29, 2010 143 Facility CapitalSource Acquisitions Property	Dec. 22, 2009 143 Facility CapitalSource Acquisitions Property	Jun. 29, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Bed Property State Operator Contract	Dec. 31, 2012 143 Facility CapitalSource Acquisitions HUD Portfolio Closing	Dec. 31, 2011 143 Facility CapitalSource Acquisitions HUD Portfolio Closing	Dec. 31, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing	Dec. 31, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Land	Dec. 31, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Buildings and Site Improvements	Dec. 31, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Furniture and fixtures	Jun. 29, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Guaranteed US HUD Notes	Jun. 29, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Subordinated note	Jun. 29, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing Unsecured 9% Debt	Jun. 29, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing HUD 6.61% Debt	Jun. 29, 2010 143 Facility CapitalSource Acquisitions HUD Portfolio Closing HUD 4.85% Debt
Real Estate Properties [Line Items]
Number of facilities under agreements to purchase			40	40	40
Business acquisition, purchase price					$ 271.0
Paid consideration for escrow accounts transferred in at closing					15
Assumption of debt indebtedness for acquisition					202.0							182.0	20.0	20.0	53.0	129.0
Cash paid for acquisition					65.0
Interest rate of assumed debt														9.00%	6.61%	4.85%
Assumed indebtedness, maturity date														December 2021	January 2036 - May 2040	January 2040 -January 2045
Issuance of common stock for acquisitions, shares	995,000				995,000
Common stock issued for acquisition, value					19.0
Number of operating beds					4,882
Number of states		34			2
Number of in-place triple net leases					13
Number of operators		46			2
Annualized lease revenue					30
Business acquisition total purchase price allocated								313.3
Business acquisition purchase price allocation									32.3	264.1	16.9
Business acquisition purchase price allocation to in-place above market leases assumed								4.9
Business acquisition purchase price allocation to in-place below market leases assumed								24.1
Net amortization of below market leases						3.2	3.5	1.9
Fair value adjustment related to debt assumed								22.5
Amortization of debt fair value adjustment, per year						1.3	1.4	0.7
Future amortization of debt fair value adjustment, year one					1.2
Future amortization of debt fair value adjustment, year two					1.2
Future amortization of debt fair value adjustment, year three					1.2
Future amortization of debt fair value adjustment, year four					1.2
Future amortization of debt fair value adjustment, year five					$ 1.2
Amortization period of above market leases					5 years