Debt (Narratives) (Details)	1 Months Ended	3 Months Ended		9 Months Ended			9 Months Ended								9 Months Ended					9 Months Ended			9 Months Ended						0 Months Ended	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended				9 Months Ended		0 Months Ended					1 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2014 Fixed interest rate	Sep. 30, 2014 Variable interest rate	Sep. 30, 2014 Revolving Credit Facility USD ($)	Dec. 31, 2013 Revolving Credit Facility USD ($)	Sep. 30, 2014 Revolving Credit Facility USD USD ($)	Sep. 30, 2014 Revolving Credit Facility Euro USD ($)	Sep. 30, 2014 Revolving Credit Facility Euro EUR (€)	Sep. 30, 2014 Revolving Credit Facility GBP USD ($)	Sep. 30, 2014 Revolving Credit Facility Moody's, Baa2 Rating	Sep. 30, 2014 Revolving Credit Facility Standard & Poor's, BBB Rating	Sep. 30, 2014 Revolving Credit Facility Maximum	Sep. 30, 2014 Revolving Credit Facility Maximum Eurocurrency	Sep. 30, 2014 Revolving Credit Facility Maximum Base Rate	Sep. 30, 2014 Revolving Credit Facility Minimum	Sep. 30, 2014 Revolving Credit Facility Minimum Eurocurrency	Sep. 30, 2014 Revolving Credit Facility Minimum Base Rate	Sep. 30, 2014 Term Loan Facility USD ($)	Dec. 31, 2013 Term Loan Facility USD ($)	Sep. 30, 2014 Term Loan Facility Maximum Eurocurrency	Sep. 30, 2014 Term Loan Facility Maximum Base Rate	Sep. 30, 2014 Term Loan Facility Minimum Eurocurrency	Sep. 30, 2014 Term Loan Facility Minimum Base Rate	Jan. 31, 2014 Senior Unsecured Credit Facility USD ($)	Sep. 30, 2014 Senior Unsecured Credit Facility USD ($)	Dec. 31, 2013 Senior Unsecured Credit Facility USD ($)	Mar. 31, 2014 Senior Unsecured Notes USD ($)	Mar. 31, 2014 Senior Unsecured Notes USD ($)	Sep. 30, 2014 Senior Unsecured Notes USD ($)	Sep. 30, 2014 Senior Unsecured Notes Moody's, Baa2 Rating	Sep. 30, 2014 Senior Unsecured Notes Standard & Poor's, BBB Rating	Jul. 31, 2013 Unsecured Term Loan USD ($)	Sep. 30, 2014 Non-Recourse Debt USD ($)	Sep. 30, 2014 Mortgage Loan USD ($) loan	Jan. 31, 2014 CPA: 16 - Global USD ($)	Jan. 31, 2014 CPA: 16 - Global Fixed interest rate USD ($) loan	Jan. 31, 2014 CPA: 16 - Global Variable interest rate USD ($) loan	Jan. 31, 2014 CPA: 16 - Global Unsecured Term Loan USD ($)	Sep. 30, 2014 Merged Entities USD ($)	Oct. 31, 2014 Subsequent Event Revolving Credit Facility USD ($)
Line of Credit Facility [Line Items]
Debt instrument, covenant compliance																														We were in compliance with all of these covenants at September 30, 2014.
Credit facility, maturity date									Jan. 31, 2018														Jan. 31, 2016
Debt scheduled to mature in 2016	$ 623,740,000	$ 623,740,000		$ 623,740,000																			$ 250,000,000
Debt scheduled to mature in 2018	656,476,000	656,476,000		656,476,000					368,900,000
Debt scheduled to mature through 2038	1,429,879,000	1,429,879,000		1,429,879,000																														500,000,000
Debt instrument stated interest rate																		1.70%	0.70%		0.925%	0.00%			1.95%	0.95%	1.00%	0.00%				4.60%	4.60%
Debt financing cost																													7,900,000				4,200,000
Revolving Line Of Credit
Line of credit, maximum borrowing amount									1,000,000,000	450,000,000													250,000,000	175,000,000					1,250,000,000.00		625,000,000						300,000,000
Senior unsecured credit facility and unsecured term loan	618,945,000	618,945,000		618,945,000		575,000,000					110,000,000	226,400,000	178,500,000	32,500,000									250,000,000						765,000,000	618,900,000										170,000,000			170,000,000
Repayment of debt																																													225,800,000
Repayments of senior credit facility				1,395,000,000	348,000,000
Share issued in public offering, shares	4,600,000
Line of credit, amount available in foreign currency									500,000,000
Amount available for swing line loan									50,000,000
Amount available for letters of credit									50,000,000
Debt Instrument borrowing capacity fee (percentage)									0.20%								0.30%			0.125%
Increase in maximum line of credit borrowing amount									1,000,000
Line of credit facility, available									631,100,000
Debt instrument, basis spread on variable rate									1.10%														1.25%											0.30%
Maximum cash distribution, percent of Adjusted Funds from Operations																														95.00%
Maximum cash distribution																														100,000,000
Loss on extinguishment of debt gross																																							8,300,000
Gain (Loss) on extinguishment of debt, net of tax				410,000	(36,000)																								(2,100,000)										(7,000,000)
Loss in extinguishment of debt, discontinued operations		0	0	1,267,000	(98,000)																																		1,300,000
Credit facility potential increase																														500,000,000
Senior Unsecured Notes
Debt instrument, face amount																																500,000,000	500,000,000
Percentage of par value received for debt issued																																99.639%	99.639%
Unamortized discount (premium)	(3,976,000)	(3,976,000)		(3,976,000)																												1,800,000	1,800,000	1,700,000										(5,700,000)
Debt instrument, effective interest rate																																4.645%	4.645%
Debt instrument, maturity date																																Apr. 01, 2024
Debt instrument, term																																10 years		3 months
Debt instrument, payment term																																ten-year term
Debt instrument, frequency of periodic payment																																semi-annually
Debt instrument, call feature																																		The Senior Unsecured Notes can be redeemed at par within three months of maturity, or we can call the notes at any time for the principal, accrued interest and a make-whole amount based upon a rate of the ten-year U.S. Treasury yield plus 30 basis points.
Debt instrument, credit rating															Baa2	BBB																			Baa2	BBB-
Non Recourse Debt
Collateral mortgage loan, carrying value	3,500,000,000	3,500,000,000		3,500,000,000		1,900,000,000
Mortgage loan on real estate, minimum interest rate							3.20%	1.10%
Mortgage loan on real estate, maximum interest rate							7.80%	7.60%
Debt instrument maturity date, range start				Dec. 31, 2014
Debt instrument maturity date, range end				Dec. 31, 2038
Decrease in exchange rate	7.90%	7.90%		7.90%
Foreign currency exchange rate	1.2687	1.2687		1.2687		1.3768
Decrease in value of balance sheet item due to foreign currency translation		55,096,000	(17,675,000)	52,140,000	(13,017,000)																																	79,200,000
Carrying value of foreclosed property	3,700,000	3,700,000		3,700,000
Mortgage debt associated with foreclosed debt				3,700,000
Amount of debt acquired																																									1,400,000,000	161,900,000
Mortgage loans on real estate, weighted average interest rate																																							5.30%		5.79%	3.63%
Number of loans assumed																																									97	18
Fair value market adjustment																																								9,800,000
Number of loans paid off in period																																							20
Prepayment of mortgage principal				216,065,000	0																																		216,100,000
Debt instrument remaining term																																							1 year 4 months 24 days
Payment for debt defeasance																																							7,200,000
Proceeds from mortgage financing				$ 12,330,000	$ 113,000,000