Equity Investments in Real Estate (Details 1) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Nov. 19, 2014
Ownership interest in equity investments:
Equity investments in real estate	$ 535,934	$ 531,000
Shelborne Property Associates, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	33.00%
Equity investments in real estate	$ 154,664	152,801
C1000 Logistiek Vastgooed B.V | WPC
Ownership interest in equity investments:
Ownership interest, percentage	85.00%
Equity investments in real estate	$ 62,653	71,130
BPS Nevada, LLC
Ownership interest in equity investments:
Ownership interest, percentage			15.00%
Equity investments in real estate			$ 18,200
BPS Nevada, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	15.00%
Equity investments in real estate	$ 48,707	40,032
IDL Wheel Tenant, LLC | Third Party
Ownership interest in equity investments:
Equity investments in real estate	$ 47,203	30,049
BG LLH, LLC | Third Party
Ownership interest in equity investments:
Ownership interest, percentage	7.00%
Equity investments in real estate	$ 41,121	42,587
U-haul Moving Partners Inc And Mercury Partners LP | WPC
Ownership interest in equity investments:
Ownership interest, percentage	12.00%
Equity investments in real estate	$ 40,160	41,028
Bank Pekao S.A. | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	$ 27,695	31,045
State Farm | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	$ 19,243	20,414
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	$ 17,986	20,147
Apply Sorco | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	49.00%
Equity investments in real estate	$ 17,953	19,076
Berry Plastics Corporation | WPC
Ownership interest in equity investments:
Ownership interest, percentage	50.00%
Equity investments in real estate	$ 16,213	16,632
Tesco plc | WPC
Ownership interest in equity investments:
Ownership interest, percentage	49.00%
Equity investments in real estate	$ 12,716	14,194
Hellweg Die Profi-Baumärkte GmbH & Co. KG (referred to as Hellweg 2) | WPC
Ownership interest in equity investments:
Ownership interest, percentage	37.00%
Equity investments in real estate	$ 9,373	9,935
Agorkor (referred to as Agrokor 5) | CPA 18 - Global
Ownership interest in equity investments:
Ownership interest, percentage	20.00%
Equity investments in real estate	$ 7,896	8,760
Eroski Sociedad Cooperativa - Mallorca | WPC
Ownership interest in equity investments:
Ownership interest, percentage	30.00%
Equity investments in real estate	$ 7,017	7,662
Dicks Sporting Goods, Inc. | WPC
Ownership interest in equity investments:
Ownership interest, percentage	45.00%
Equity investments in real estate	$ 5,334	$ 5,508