Merger with CPA:18 – Global - Purchase Price Allocation (Details) - USD ($) $ in Thousands		9 Months Ended
	Aug. 01, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Business Acquisition
Cash consideration paid		$ 423,435	$ 0
Liabilities Assumed at Fair Value
Goodwill		$ 1,023,171		$ 901,529
CPA 18 Merger
Business Acquisition
Fair value of W. P. Carey shares of common stock issued	$ 1,205,750
Cash consideration paid	423,297
Cash paid for fractional shares	138
Merger Consideration	1,629,185
Fair value of our equity interest in CPA:18 – Global prior to the CPA:18 Merger	88,299
Fair value of our equity interest	1,746,058
Assets Acquired at Fair Value
Land, buildings and improvements — net lease and other	881,613
Land, buildings and improvements — operating properties	1,000,447
Net investments in direct financing leases and loans receivable	38,517
In-place lease and other intangible assets	224,458
Above-market rent intangible assets	61,090
Assets held for sale	85,026
Cash and cash equivalents and restricted cash acquired	331,063
Other assets, net (excluding restricted cash)	25,229
Net assets acquired excluding cash and restricted cash	2,647,443
Liabilities Assumed at Fair Value
Non-recourse mortgages, net	900,173
Accounts payable, accrued expenses and other liabilities	90,035
Below-market rent and other intangible liabilities	16,836
Deferred income taxes	52,320
Total liabilities	1,059,364
Total identifiable net assets	1,588,079
Amounts attributable to noncontrolling interests	(14,367)
Goodwill	172,346
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest	1,746,058
Cash and cash equivalents and restricted cash acquired	331,063
CPA 18 Merger | Jointly owned investments
Business Acquisition
Fair value of our equity interest in CPA:18 – Global prior to the CPA:18 Merger	$ 28,574