Equity Investments in Real Estate (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Ownership interest in equity investments:
Equity investments in real estate	$ 497,691		$ 412,964
Shelborne Property Associates, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	33.00%
Equity investments in real estate	142,695		129,575
C1000 Logistiek Vastgooed B.V | WPC
Ownership interest in equity investments:
Ownership interest, percentage	85.00%
Equity investments in real estate	80,624		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	42,181		43,051
Bank Pekao | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	50.00%	50.00%
Equity investments in real estate	36,545		0
Lineage Logistics Holdings LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	7.00%
Equity investments in real estate	30,035		0
IDL Wheel Tenant, LLC | Third Party
Ownership interest in equity investments:
Equity investments in real estate	27,274		6,017
BPS Nevada, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	15.00%
Equity investments in real estate	23,834		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	21,934		23,907
State Farm | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	20,987		20,913
Berry Plastics Corporation | WPC
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	17,158		17,659
Tesco plc | WPC
Ownership interest in equity investments:
Ownership interest, percentage	49.00%
Equity investments in real estate	17,020		17,965
Hellweg Die Profi Baumarkt Gmbh And Co KG | WPC
Ownership interest in equity investments:
Ownership interest, percentage	37.00%
Equity investments in real estate	11,457		12,978
Agorkor 5 | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	20.00%
Equity investments in real estate	11,359		19,217
Eroski Sociedad Cooperativa Mallorca | WPC
Ownership interest in equity investments:
Ownership interest, percentage	30.00%
Equity investments in real estate	9,502		9,639
Dicks Sporting Goods Inc. | WPC
Ownership interest in equity investments:
Ownership interest, percentage	45.00%
Equity investments in real estate	$ 5,086		$ 4,646