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Change in carrying amount of other real estate not separately disclosed. The change includes for example, but is not limited to, additions, improvements, disposals and valuation adjustments.

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Weighted average amortization period of finite-lived intangible assets and liabilities acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land Investment Building and Building Improvements Operating Leases

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Amount of assets under construction that are now placed into service as the balance sheet date.

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Land, Buildings and Improvements - Narratives (Details) $ in Thousands																							1 Months Ended											2 Months Ended		3 Months Ended				12 Months Ended
	Dec. 27, 2018 USD ($)	Dec. 21, 2018 USD ($)	Dec. 20, 2018 USD ($)	Dec. 17, 2018 USD ($)	Dec. 14, 2018 USD ($) property	Oct. 31, 2018 USD ($) property	Oct. 30, 2018 USD ($) property	Sep. 28, 2018 USD ($)	Jul. 19, 2018 USD ($)	Jul. 17, 2018 USD ($)	Jul. 13, 2018 USD ($) property	Jun. 28, 2018 USD ($) property	Jun. 05, 2018 USD ($) property	Mar. 15, 2018 USD ($) property	Feb. 21, 2018 USD ($)	Nov. 14, 2017 USD ($)	Jun. 27, 2017 USD ($)	Dec. 09, 2016 USD ($)	Dec. 01, 2016 USD ($) property	Oct. 20, 2016 USD ($)	Oct. 04, 2016 USD ($)	Apr. 14, 2016 USD ($) property	Dec. 31, 2018 USD ($) property tenant $ / €	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Apr. 30, 2018 USD ($) property	Jan. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) property $ / €	Jun. 30, 2017 USD ($)	May 31, 2017 USD ($) property	Mar. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)	Dec. 09, 2016 USD ($)	May 31, 2016 USD ($) property	Dec. 31, 2018 USD ($) property tenant $ / €	Jun. 30, 2018 property	Dec. 31, 2017 USD ($) property $ / €	Sep. 30, 2017 property	Dec. 31, 2018 USD ($) property tenant $ / €	Dec. 31, 2017 USD ($) property $ / €	Dec. 31, 2016 USD ($) property
Investments in real estate
Increase in value of balance sheet item due to foreign currency translation																																								$ (31,843)	$ 72,428	$ (92,434)
Net investments in direct financing leases																							$ 1,306,215						$ 721,607							$ 1,306,215		$ 721,607		1,306,215	721,607
Land, buildings and improvements																							9,251,396						5,457,265							9,251,396		5,457,265		9,251,396	5,457,265
Depreciation																																								162,600	143,900	142,700
Purchases of real estate																																								719,548	31,842	531,694
Funds capitalized for construction in progress																																								$ 65,600	$ 39,800
Construction projects in progress \| property																																								4	5
Unfunded commitment																							$ 204,500						147,900							$ 204,500		$ 147,900		$ 204,500	$ 147,900
Assets placed into service																																								$ 102,500	$ 65,400	$ 35,500
Number of properties sold \| property																																				39	25	5	5
Discontinued Operations, Disposed of by Sale
Investments in real estate
Number of properties sold \| property																																								49	16	30
Land, buildings and improvements and intangibles \| Discontinued Operations, Disposed of by Sale
Investments in real estate
Number of properties sold \| property																											1													46
Other real estate, period increase (decrease)																																								$ (255,600)
Below-market rent
Investments in real estate
Purchases of real estate																																								$ 12,200
Acquired finite lived intangible liabilities weighted average useful life																																								22 years 1 month 6 days
Below-market ground lease
Investments in real estate
Purchases of real estate																																								$ 5,500
In-place lease
Investments in real estate
Purchases of real estate																																								$ 108,300
Weighted average useful life of intangible assets																																								19 years 1 month 6 days
Above-market rent
Investments in real estate
Purchases of real estate																																								$ 9,900
Weighted average useful life of intangible assets																																								18 years 9 months 18 days
Below-market ground lease
Investments in real estate
Purchases of real estate																																								$ 2,300
Weighted average useful life of intangible assets																																								36 years 1 month 6 days
Industrial Facility in Chicago, Illinois
Investments in real estate
Assets placed into service																										$ 3,500
Education Facility in Houston, TX
Investments in real estate
Assets placed into service																												$ 21,100
Industrial Facility in Zawiercie, Poland
Investments in real estate
Assets placed into service																											$ 11,400
Industrial Facilities in Albemarle and Old Fort, North Carolina
Investments in real estate
Number of real estate properties \| property																											2
Assets placed into service																											$ 2,200
Education Facility in Windermere, Florida
Investments in real estate
Assets placed into service																									$ 15,100
Retail Facility in Kennesaw, Georgia
Investments in real estate
Assets placed into service																									5,500
Industrial Facility in Radomsko, Poland
Investments in real estate
Assets placed into service																									$ 16,000
Windsor Connecticut
Investments in real estate
Assets placed into service																																$ 3,300
Property in Coconut Creek Florida
Investments in real estate
Assets placed into service																								$ 24,500							$ 18,200
Industrial Facility in Homesville, OH
Investments in real estate
Construction projects in progress																							3,100
Warehouse facility in Rotterdam, Netherlands
Investments in real estate
Other commitments																							$ 19,600													$ 19,600				$ 19,600
Industrial facility in San Antonio, TX
Investments in real estate
Other commitments																							$ 75,000													$ 75,000				$ 75,000
Monarto Australia
Investments in real estate
Number of real estate properties \| property																															2
Assets placed into service																															$ 15,900
McCalla Alabama
Investments in real estate
Assets placed into service																														$ 21,600
Mönchengladbach, Germany
Investments in real estate
Assets placed into service																													$ 6,400
Property in Doraville, Georgia
Investments in real estate
Assets placed into service																																	$ 13,800
Adjustments
Investments in real estate
Number of real estate properties \| property																							4													4				4
Net investments in direct financing leases																							$ (16,000)													$ (16,000)				$ (16,000)
Land, buildings and improvements																							$ 16,000													$ 16,000				$ 16,000
Real Estate
Investments in real estate
Number of real estate properties \| property																							1,163													1,163				1,163
Number of tenants \| tenant																							304													304				304
CPA:17 – Global
Investments in real estate
Additional land, building and improvements subject to operating lease from acquisition						$ 2,954,034																	$ 3,000,000													$ 3,000,000				$ 3,000,000
CPA:17 – Global \| Real Estate
Investments in real estate
Number of real estate properties \| property						28
CPA:17 – Global \| Below-market rent
Investments in real estate
Weighted average useful life of intangible assets						25 years 1 month 6 days
CPA:17 – Global \| In-place lease
Investments in real estate
Weighted average useful life of intangible assets						11 years 2 months 12 days
CPA:17 – Global \| Above-market rent
Investments in real estate
Weighted average useful life of intangible assets						12 years 2 months 12 days
CPA:17 – Global \| Below-market ground lease
Investments in real estate
Weighted average useful life of intangible assets						57 years 1 month 6 days
Land building and improvements
Investments in real estate
Increase in value of balance sheet item due to foreign currency translation																																								(79,500)
Purchases of real estate																																		$ 1,900						806,900	$ 31,800	$ 530,300
Acquisition costs, capitalized																																								$ 17,300	100	4,000
Number of properties disposed of \| property													23
Number of tenants \| tenant																							2													2				2
Purchase option exercise price, value																							$ 8,600													$ 8,600				$ 8,600
Assets held for sale																							$ 6,600													$ 6,600				$ 6,600
Land building and improvements \| Discontinued Operations, Held-for-sale
Investments in real estate
Number of real estate properties \| property																							3													3				3
Number of tenants \| tenant																							1													1				1
Assets held for sale																							$ 14,200													$ 14,200				$ 14,200
Land building and improvements \| Land
Investments in real estate
Purchases of real estate																																								126,400	4,800	140,200
Land building and improvements \| Building
Investments in real estate
Purchases of real estate																																								571,600	18,500	259,800
Land building and improvements \| Net Lease Intangible
Investments in real estate
Purchases of real estate																																								113,700	$ 8,500	130,300
Land building and improvements \| Other liabilities
Investments in real estate
Purchases of real estate																																								$ 4,800
Land building and improvements \| Warehouse Sellersburg, Indiana
Investments in real estate
Purchases of real estate															$ 6,100
Land building and improvements \| Retail Facilities in Appleton & Madison, Waukesha Wisconsin
Investments in real estate
Purchases of real estate														$ 79,100
Land building and improvements \| Retail Facilities in Appleton & Madison, Waukesha Wisconsin \| Warehouse
Investments in real estate
Number of real estate properties \| property														1
Land building and improvements \| Retail Facilities in Appleton & Madison, Waukesha Wisconsin \| Retail Site
Investments in real estate
Number of real estate properties \| property														2
Land building and improvements \| Manufacturing Facility in Bessemer, Alabama
Investments in real estate
Purchases of real estate													$ 85,500
Land building and improvements \| Various Facilities in Denmark
Investments in real estate
Purchases of real estate												$ 186,600
Deferred tax liability assumed in real estate acquisitions												$ 33,200
Land building and improvements \| Various Facilities in Denmark \| Logistics Facility
Investments in real estate
Number of real estate properties \| property												14
Land building and improvements \| Various Facilities in Denmark \| Office Building
Investments in real estate
Number of real estate properties \| property												1
Land building and improvements \| Various Retail Facilities in the Netherlands
Investments in real estate
Number of real estate properties \| property											36
Purchases of real estate											$ 177,800
Land building and improvements \| Manufacturing Facility in Oostburg, Wisconsin
Investments in real estate
Purchases of real estate										$ 9,100
Land building and improvements \| Office/Warehouse facility in Kampen the Netherlands
Investments in real estate
Purchases of real estate									$ 22,900
Land building and improvements \| Logistics Facility in Azambuja, Portugal
Investments in real estate
Purchases of real estate								$ 49,900
Deferred tax liability assumed in real estate acquisitions								$ 10,500
Land building and improvements \| Car Dealerships in the Netherlands
Investments in real estate
Number of real estate properties \| property							4
Purchases of real estate							$ 29,800
Payments for property improvements							$ 3,200
Land building and improvements \| Industrial Facility in Chicago, Illinois
Investments in real estate
Number of real estate properties \| property					6
Purchases of real estate					$ 33,000												$ 6,000
Other commitments																	$ 3,600
Land building and improvements \| Office Building in Roseville, Minnesota
Investments in real estate
Purchases of real estate																$ 25,800
Land building and improvements \| Warehouse facilities in McHenry, IL
Investments in real estate
Purchases of real estate					$ 30,600
Land building and improvements \| Warehouse facility in Kilgore, TX
Investments in real estate
Purchases of real estate				$ 41,400
Other commitments				$ 14,000
Land building and improvements \| Industrial facility in San Luis Potosi, Mexico
Investments in real estate
Purchases of real estate			$ 17,000
Land building and improvements \| Industrial facility in Legnica, Poland
Investments in real estate
Purchases of real estate		$ 14,800
Land building and improvements \| Industrial facility in Meru, France
Investments in real estate
Purchases of real estate	$ 23,100
Land building and improvements \| Private Campus in Various Locations
Investments in real estate
Number of real estate properties \| property																																			3
Purchases of real estate																																			$ 167,700
Other commitments																																			$ 128,100
Land building and improvements \| Various Manufacturing Facilities in The United State and Canada
Investments in real estate
Purchases of real estate																						$ 218,200
Land building and improvements \| Various Manufacturing Facilities in The United State and Canada \| Domestic
Investments in real estate
Number of real estate properties \| property																						43
Land building and improvements \| Various Manufacturing Facilities in The United State and Canada \| Canada
Investments in real estate
Number of real estate properties \| property																						6
Land building and improvements \| Manufacturing facility in San Antonio, Texas
Investments in real estate
Purchases of real estate																					$ 3,800
Land building and improvements \| Manufacturing facilities in various locations in Canada, Mexico, and the United States
Investments in real estate
Purchases of real estate																			$ 140,700
Deferred tax liability																			$ (29,400)
Land building and improvements \| Manufacturing facilities in various locations in Canada, Mexico, and the United States \| Manufacturing Facility
Investments in real estate
Number of real estate properties \| property																			13
Land building and improvements \| Manufacturing facilities in various locations in Canada, Mexico, and the United States \| Office Facility
Investments in real estate
Number of real estate properties \| property																			1
Land building and improvements \| Land in McCalla, Alabama
Investments in real estate
Purchases of real estate																				$ 1,100
Other commitments																				$ 21,500
Land building and improvements \| Land in Rio Rancho, New Mexico
Investments in real estate
Purchases of real estate																		$ 800
Maximum tenant reimbursement cost																		$ 600																$ 600
Operating Properties \| Real Estate
Investments in real estate
Number of real estate properties \| property																							48													48				48
Operating Properties \| CPA:17 – Global \| Real Estate
Investments in real estate
Number of real estate properties \| property																							232													232				232
Hotel \| Land, buildings and improvements and intangibles \| Discontinued Operations, Disposed of by Sale
Investments in real estate
Number of real estate properties \| property																											1		2									2			2
Hotel \| Real Estate
Investments in real estate
Number of real estate properties \| property																							2													2				2
Operating real estate
Investments in real estate
Depreciation																																								$ 4,200	$ 4,300	$ 4,200
Decrease in property																											$ 33,200
Other real estate, period increase (decrease)																																								$ 426,800
Operating real estate \| Self Storage
Investments in real estate
Number of real estate properties \| property																							37													37				37
Operating real estate \| Hotel
Investments in real estate
Number of real estate properties \| property																							2													2				2
Operating real estate \| CPA:17 – Global \| Self Storage
Investments in real estate
Number of real estate properties \| property																											37
Operating real estate \| CPA:17 – Global \| Hotel
Investments in real estate
Number of real estate properties \| property																							1													1				1
Self Storage \| Real Estate
Investments in real estate
Number of real estate properties \| property																							46													46				46
Self Storage \| CPA:17 – Global \| Real Estate
Investments in real estate
Number of real estate properties \| property						7
Euro
Investments in real estate
(Decrease) increase in exchange rate																																								(4.50%)
Foreign currency exchange rate \| $ / €																							1.1450						1.1993							1.1450		1.1993		1.1450	1.1993