DIVIDENDS (Details)	12 Months Ended
Dec. 31, 2018 $ / shares
Dividend Record Date January 31, 2018 [Member]
Dividends Payable [Line Items]
Record Date	Jan. 31, 2018
Payment Date	Feb. 15, 2018
Dividend per Common Share	$ 0.66
Dividend Record Date April 30, 2018 [Member]
Dividends Payable [Line Items]
Record Date	Apr. 30, 2018
Payment Date	May 15, 2018
Dividend per Common Share	$ 0.66
Dividend Record Date July 31, 2018 [Member]
Dividends Payable [Line Items]
Record Date	Jul. 31, 2018
Payment Date	Aug. 15, 2018
Dividend per Common Share	$ 0.66
Dividend Record Date October 31, 2018 [Member]
Dividends Payable [Line Items]
Record Date	Oct. 31, 2018
Payment Date	Nov. 15, 2018
Dividend per Common Share	$ 0.66
Dividend Record Date January 31, 2019 [Member]
Dividends Payable [Line Items]
Record Date	Jan. 31, 2019
Payment Date	Feb. 15, 2019
Dividend per Common Share	$ 0.66

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

+ Details

Name:	us-gaap_DividendPayableDateToBePaidDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DividendsAxis=ohi_DividendRecordDate31January2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ohi_DividendRecordDateApril302018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ohi_DividendRecordDateJuly312018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ohi_DividendRecordDateOctober312018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DividendsAxis=ohi_DividendRecordDateJanuary312019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: