CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Rental income	$ 767,340	$ 775,176	$ 743,885
Income from direct financing leases	1,636	32,336	62,298
Mortgage interest income	70,312	66,202	69,811
Other investment income	40,228	29,225	21,852
Miscellaneous income	2,166	5,446	2,981
Total operating revenues	881,682	908,385	900,827
Expenses
Depreciation and amortization	281,279	287,591	267,062
General and administrative	63,508	47,683	45,867
Acquisition costs	383		9,582
Impairment on real estate properties	29,839	99,070	58,726
Impairment on direct financing leases	27,168	198,199
Provision for uncollectible accounts	6,689	14,580	9,845
Total operating expenses	408,866	647,123	391,082
Other operating income
Gain on assets sold - net	24,774	53,912	50,208
Operating income	497,590	315,174	559,953
Other income (expense)
Interest income and other - net	313	267	173
Interest expense	(192,462)	(188,762)	(164,103)
Interest - amortization of deferred financing costs	(8,960)	(9,516)	(9,345)
Interest - refinancing costs		(21,965)	(2,113)
Contractual settlement		10,412
Realized gain (loss) on foreign exchange	32	311	(232)
Total other expense	(201,077)	(209,253)	(175,620)
Income from continuing operations	296,513	105,921	384,333
Income tax expense	(3,010)	(3,248)	(1,405)
Income from unconsolidated joint venture	381	2,237	439
Net income	293,884	104,910	383,367
Net income attributable to noncontrolling interest	(12,306)	(4,491)	(16,952)
Net income available to common stockholders	$ 281,578	$ 100,419	$ 366,415
Basic:
Net income available to common stockholders	$ 1.41	$ 0.51	$ 1.91
Diluted:
Net income	$ 1.40	$ 0.51	$ 1.90
Weighted-average shares outstanding, Basic and Diluted
Weighted-average shares outstanding, basic (in shares)	200,279	197,738	191,781
Weighted-average shares outstanding, diluted (in shares)	209,711	206,790	201,635
Omega OP
Revenue
Rental income	$ 767,340	$ 775,176	$ 743,885
Income from direct financing leases	1,636	32,336	62,298
Mortgage interest income	70,312	66,202	69,811
Other investment income	40,228	29,225	21,852
Miscellaneous income	2,166	5,446	2,981
Total operating revenues	881,682	908,385	900,827
Expenses
Depreciation and amortization	281,279	287,591	267,062
General and administrative	63,508	47,683	45,867
Acquisition costs	383		9,582
Impairment on real estate properties	29,839	99,070	58,726
Impairment on direct financing leases	27,168	198,199
Provision for uncollectible accounts	6,689	14,580	9,845
Total operating expenses	408,866	647,123	391,082
Other operating income
Gain on assets sold - net	24,774	53,912	50,208
Operating income	497,590	315,174	559,953
Other income (expense)
Interest income and other - net	313	267	173
Interest expense	(192,462)	(188,762)	(164,103)
Interest - amortization of deferred financing costs	(8,960)	(9,516)	(9,345)
Interest - refinancing costs		(21,965)	(2,113)
Contractual settlement		10,412
Realized gain (loss) on foreign exchange	32	311	(232)
Total other expense	(201,077)	(209,253)	(175,620)
Income from continuing operations	296,513	105,921	384,333
Income tax expense	(3,010)	(3,248)	(1,405)
Income from unconsolidated joint venture	381	2,237	439
Net income	293,884	104,910	383,367
Net income available to common stockholders	$ 293,884	$ 104,910	$ 383,367
Basic:
Net income available to common stockholders	$ 1.41	$ 0.51	$ 1.91
Diluted:
Net income	1.40	0.51	1.90
Net income (loss) available to Omega OP Unit holders:
Net income (in dollars per share)	1.41	0.51	1.91
Diluted:
Net income (in dollars per share)	$ 1.40	$ 0.51	$ 1.90
Weighted-average shares outstanding, Basic and Diluted
Weighted-average shares outstanding, basic (in shares)	209,020	206,521	200,679
Weighted-average shares outstanding, diluted (in shares)	209,711	206,790	201,635
Weighted-average Omega OP Units outstanding, basic (in shares)	209,020	206,521	200,679
Weighted-average Omega OP Units outstanding, diluted (in shares)	209,711	206,790	201,635