DEBT - Narrative (Details)					3 Months Ended		9 Months Ended
	Jun. 10, 2015 USD ($)	Oct. 10, 2014 USD ($)	Feb. 11, 2014 USD ($)	Jan. 08, 2014 USD ($)	Sep. 30, 2015 USD ($) Facilitiy	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Facilitiy	Sep. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) loan	Jun. 30, 2015 CAD loan	Jun. 11, 2015 CAD loan	Jun. 10, 2015 CAD	Mar. 31, 2015 USD ($) loan	Feb. 28, 2015	Dec. 31, 2014 USD ($)	Sep. 10, 2014 USD ($)
Debt Instrument [Line Items]
Debt, aggregate principal amount					$ 1,339,721,000		$ 1,339,721,000
Payments made to noteholders for early redemption					0	$ 158,000	0	$ 22,454,000
Revolving credit facility					204,000,000		204,000,000								$ 68,000,000
Interest expense					15,176,000	10,540,000	43,108,000	32,668,000
Deferred financing costs amortization included in interest expense					1,300,000	$ 900,000	3,829,000	2,812,000
Accrued interest					9,000,000		$ 9,000,000								$ 13,200,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Optional extension period							1 year
Interest expense					800,000		$ 1,300,000
Unused facility fees					$ 300,000		$ 1,000,000
5.5% Senior Unsecured Notes due 2021 [Member]
Debt Instrument [Line Items]
Interest rate					5.50%		5.50%
5.375% Senior Unsecured Notes Due 2023 [Member]
Debt Instrument [Line Items]
Interest rate					5.375%		5.375%
8.125% Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Interest rate				8.125%
Debt, aggregate principal amount				$ 211,300,000	$ 0		$ 0
Amount retired			$ 400,000	$ 210,900,000
Redemption premium			109.485%	109.837%
Tender off and redemption related costs and write-offs								21,600,000
Payments made to noteholders for early redemption								20,800,000
Write-offs associated with unamortized deferred financing and premium costs								$ 800,000
Revolving Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowing capacity																$ 650,000,000.0
Accordion feature, additional capacity																$ 100,000,000.0
Term loan		$ 200,000,000.0
Interest rate cap contract term		5 years
Optional extension period		1 year
Revolving credit facility					204,000,000		204,000,000
Available borrowing capacity					$ 246,000,000		$ 246,000,000
Interest rate					2.49%		2.49%
Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Annum percent unused borrowing fee							0.25%
Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Annum percent unused borrowing fee							0.35%
Revolving Credit Facility [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		2.00%
Canadian Term Loan [Member]
Debt Instrument [Line Items]
Interest rate swap, fixed	1.59%											1.59%
Canadian Term Loan [Member] | Sabra Canadian Holdings, LLC [Member]
Debt Instrument [Line Items]
Debt amount	$ 73,200,000											CAD 90,000,000.0
Canadian Term Loan [Member] | Canadian Dollar Offer Rate (CDOR) [Member] | Minimum [Member] | Sabra Canadian Holdings, LLC [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Canadian Term Loan [Member] | Canadian Dollar Offer Rate (CDOR) [Member] | Maximum [Member] | Sabra Canadian Holdings, LLC [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.60%
Mortgages [Member]
Debt Instrument [Line Items]
Number of properties | Facilitiy					3		3
Debt amount					$ 28,700,000		$ 28,700,000						$ 59,200,000
Interest rate					3.64%		3.64%
Number of mortgage loans | loan													6
Weighted average interest rate													3.98%	4.39%
Debt, aggregate principal amount					$ 168,608,000		$ 168,608,000
Mortgages [Member] | Canadian Portfolio [Member]
Debt Instrument [Line Items]
Interest rate									3.74%	3.74%
Number of mortgage loans | loan									3	3	3
Outstanding principal amounts									$ 19,700,000	CAD 24,200,000	CAD 24,200,000