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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for translation gain (loss) realized upon the sale or liquidation of an investment in a foreign entity and foreign currency hedges that are designated and qualified as hedging instruments for hedges of the foreign currency exposure of a net investment in a foreign operation.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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STOCKHOLDERS'/OWNERS' EQUITY (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 3,764,484	$ 3,898,258	$ 4,211,986
Balance , ending	4,336,594	3,764,484	3,898,258
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,764,484	3,898,258	3,898,258	$ 4,336,594	$ 3,764,484	$ 3,898,258
Add: portion included in noncontrolling interest				(201,166)	(320,043)
Stockholders Equity/AOCI				4,135,428	3,444,441
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(41,652)	(30,150)	(53,827)
Balance , ending	(39,858)	(41,652)	(30,150)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(39,858)	(41,652)	(30,150)	(39,858)	(41,652)	(30,150)
Omega OP \| Foreign Currency Translation [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(47,704)	(26,033)	(54,948)
Translation gain (loss)	12,646	(21,703)	28,604
Realized gain (loss)	(42)	32	311
Balance , ending	(35,100)	(47,704)	(26,033)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(47,704)	(26,033)	(26,033)	(35,100)	(47,704)	(26,033)
Omega OP \| Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	3,994	1,463	(1,420)
Unrealized (loss) gain	(7,071)	2,593	5,221
Realized gain (loss)	708	(62)	(2,338)
Balance , ending	(2,369)	3,994	1,463
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	3,994	1,463	1,463	(2,369)	3,994	1,463
Omega OP \| Net Investment Hedge [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	70	(7,070)	0
Unrealized (loss) gain	(4,490)	7,140	(7,070)
Balance , ending	(4,420)	70	(7,070)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	70	70	0	(4,420)	70	(7,070)
Omega OP \| Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(43,640)	(31,640)
Balance , ending	(41,889)	(43,640)	(31,640)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (43,640)	$ (31,640)	$ (31,640)	(41,889)	(43,640)	(31,640)
Add: portion included in noncontrolling interest				2,031	1,988	1,490
Stockholders Equity/AOCI				$ (39,858)	$ (41,652)	$ (30,150)