Equity Investments in Real Estate (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Ownership interest in equity investments:
Equity investments in real estate	$ 506,543	$ 412,964
Shelborne Property Associates, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	33.00%
Equity investments in real estate	130,746	129,575
Bank Pekao | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	91,350	0
C1000 Logistiek Vastgooed B.V | WPC
Ownership interest in equity investments:
Ownership interest, percentage	85.00%
Equity investments in real estate	83,149	84,119
Uhaul Moving Partners Inc And Mercury Partners LP | WPC
Ownership interest in equity investments:
Ownership interest, percentage	12.00%
Equity investments in real estate	42,688	43,051
BPS Nevada, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	15.00%
Equity investments in real estate	23,551	23,278
Madison Storage NYC, LLC and Veritas Group IX-NYC, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	45.00%
Equity investments in real estate	22,974	23,907
State Farm | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	20,829	20,913
IDL Wheel Tenant, LLC | Third Party
Ownership interest in equity investments:
Equity investments in real estate	18,110	6,017
Tesco plc | WPC
Ownership interest in equity investments:
Ownership interest, percentage	49.00%
Equity investments in real estate	17,939	17,965
Berry Plastics Corporation | WPC
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	17,375	17,659
Hellweg Die Profi Baumarkt Gmbh And Co KG | WPC
Ownership interest in equity investments:
Ownership interest, percentage	37.00%
Equity investments in real estate	11,852	12,978
Agorkor 5 | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	20.00%
Equity investments in real estate	11,423	19,217
Eroski Sociedad Cooperativa Mallorca | WPC
Ownership interest in equity investments:
Ownership interest, percentage	30.00%
Equity investments in real estate	9,691	9,639
Dicks Sporting Goods Inc. | WPC
Ownership interest in equity investments:
Ownership interest, percentage	45.00%
Equity investments in real estate	$ 4,866	$ 4,646