CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 351,947	$ 293,884	$ 104,910
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	301,683	281,279	287,591
Impairment on real estate properties	48,939	35,014	99,070
Impairment on direct financing leases	7,917	27,168	198,199
Provision for uncollectible accounts		6,689	14,580
Provision for rental income	11,120
Interest - amortization of deferred financing costs and refinancing costs	9,564	8,960	19,711
Accretion of direct financing leases	13	109	(6,107)
Stock-based compensation expense	15,359	15,987	15,212
Gain on assets sold - net	(55,696)	(24,774)	(53,912)
Amortization of acquired in-place leases - net	(5,904)	(10,707)	(11,910)
Effective yield receivable on mortgage notes	(173)	(1,068)	(1,924)
Interest paid-in-kind	(7,160)	(6,360)
Loss from unconsolidated joint venture	22
Change in operating assets and liabilities - net:
Contractual receivables	(5,931)	2,368	(36,621)
Straight-line rent receivables	(46,580)	(61,559)	(25,240)
Lease inducements	(42,071)	(32,738)	(8,419)
Other operating assets and liabilities	(29,302)	(34,879)	(17,228)
Net cash provided by operating activities	553,747	499,373	577,912
Cash flows from investing activities
Acquisition of a business, net of cash acquired	(59,616)
Acquisition of real estate	(377,841)	(105,119)	(385,418)
Net proceeds from sale of real estate investments	219,262	309,586	257,812
Cash acquired in acquisition			2,341
Investments in construction in progress	(139,678)	(139,441)	(86,689)
Investments in direct financing leases			(7,183)
Proceeds from sale of direct financing lease and related trust	93,730	20,979	33,306
Placement of mortgage loans	(20,702)	(65,340)	(34,643)
Collection of mortgage principal	54,529	26,088	1,529
Investments in unconsolidated joint ventures	(103,963)
Distributions from unconsolidated joint ventures in excess of earnings	9,079	5,471	12,175
Capital improvements to real estate investments	(52,892)	(29,824)	(37,766)
Receipts from insurance proceeds	8,170	8,717	2,754
Investments in other investments	(100,312)	(385,707)	(139,047)
Proceeds from other investments	91,281	181,371	95,696
Net cash used in investing activities	(378,953)	(173,219)	(285,133)
Cash flows from financing activities
Proceeds from credit facility borrowings	1,507,000	1,291,000	1,687,000
Payments on credit facility borrowings	(1,980,100)	(1,268,000)	(1,587,000)
Noncontrolling members' contributions to consolidated joint venture	228
Receipts of other long-term borrowings	494,985		1,346,749
Payments of other long-term borrowings	(101,222)	(2,049)	(1,252,788)
Payments of financing related costs	(4,787)	(8)	(29,198)
Receipts from dividend reinvestment plan	115,051	46,801	36,722
Payments for exercised options and restricted stock	(4,556)	(1,654)	(2,143)
Net proceeds from issuance of common stock	404,863	75,532	22,120
Dividends paid	(564,127)	(528,696)	(502,603)
Redemption of Omega OP Units		(134)	(48)
Distributions to Omega OP Unit Holders	(21,294)	(23,493)	(22,626)
Net cash used in financing activities	(153,959)	(410,701)	(303,815)
Effect of foreign currency translation on cash, cash equivalents and restricted cash	874	(590)	568
Increase (decrease) in cash, cash equivalents and restricted cash	21,709	(85,137)	(10,468)
Cash, cash equivalents and restricted cash at beginning of year	11,671	96,808	107,276
Cash, cash equivalents and restricted cash at end of year	33,380	11,671	96,808
Omega OP
Cash flows from operating activities
Net income	351,947	293,884	104,910
Adjustment to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	301,683	281,279	287,591
Impairment on real estate properties	48,939	35,014	99,070
Impairment on direct financing leases	7,917	27,168	198,199
Provision for uncollectible accounts		6,689	14,580
Provision for rental income	11,120
Interest - amortization of deferred financing costs and refinancing costs	9,564	8,960	19,711
Accretion of direct financing leases	13	109	(6,107)
Stock-based compensation expense	15,359	15,987	15,212
Gain on assets sold - net	(55,696)	(24,774)	(53,912)
Amortization of acquired in-place leases - net	(5,904)	(10,707)	(11,910)
Effective yield receivable on mortgage notes	(173)	(1,068)	(1,924)
Interest paid-in-kind	(7,160)	(6,360)
Loss from unconsolidated joint venture	22
Change in operating assets and liabilities - net:
Contractual receivables	(5,931)	2,368	(36,621)
Straight-line rent receivables	(46,580)	(61,559)	(25,240)
Lease inducements	(42,071)	(32,738)	(8,419)
Other operating assets and liabilities	(29,302)	(34,879)	(17,228)
Net cash provided by operating activities	553,747	499,373	577,912
Cash flows from investing activities
Acquisition of a business, net of cash acquired	(59,616)
Acquisition of real estate	(377,841)	(105,119)	(385,418)
Net proceeds from sale of real estate investments	219,262	309,586	257,812
Cash acquired in acquisition			2,341
Investments in construction in progress	(139,678)	(139,441)	(86,689)
Investments in direct financing leases			(7,183)
Proceeds from sale of direct financing lease and related trust	93,730	20,979	33,306
Placement of mortgage loans	(20,702)	(65,340)	(34,643)
Collection of mortgage principal	54,529	26,088	1,529
Investments in unconsolidated joint ventures	(103,963)
Distributions from unconsolidated joint ventures in excess of earnings	9,079	5,471	12,175
Capital improvements to real estate investments	(52,892)	(29,824)	(37,766)
Receipts from insurance proceeds	8,170	8,717	2,754
Investments in other investments	(100,312)	(385,707)	(139,047)
Proceeds from other investments	91,281	181,371	95,696
Net cash used in investing activities	(378,953)	(173,219)	(285,133)
Cash flows from financing activities
Proceeds from secured borrowing	2,275
Repayments of secured borrowings	(1,222)
Repayment of term loan	(25,000)
Proceeds from intercompany loans payable from Omega	1,999,710	1,291,000	3,033,749
Repayment of intercompany loans payable to Omega	(2,055,100)	(1,270,049)	(2,839,788)
Payment of financing related costs incurred by Omega	(4,787)	(8)	(29,198)
Noncontrolling members' contributions to consolidated joint venture	228
Equity contributions from general partners	515,358	120,679	56,699
Distributions to general partners	(564,127)	(528,696)	(502,603)
Distributions to limited partners	(21,294)	(23,493)	(22,626)
Redemption of Omega OP Units		(134)	(48)
Net cash used in financing activities	(153,959)	(410,701)	(303,815)
Effect of foreign currency translation on cash, cash equivalents and restricted cash	874	(590)	568
Increase (decrease) in cash, cash equivalents and restricted cash	21,709	(85,137)	(10,468)
Cash, cash equivalents and restricted cash at beginning of year	11,671	96,808	107,276
Cash, cash equivalents and restricted cash at end of year	$ 33,380	$ 11,671	$ 96,808