Net Investments in Properties (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended		11 Months Ended	0 Months Ended	9 Months Ended	10 Months Ended	11 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014
Revenues from acquired properties
Revenues									$ 54,317	$ 3,292
Net Loss	(25,538)	(9,465)	(3,110)	(18,443)	(104)	(72)	(65)	0	(56,556)	(241)
Net income attributable to noncontrolling interests	(700)	(1,136)	(1,248)	3,773	(324)	(66)	0	0	689	(390)
Net Loss Attributable to CPA®:18 – Global	(26,238)	(10,601)	(4,358)	(14,670)	(428)	(138)	(65)	0	(55,867)	(631)
Business Combinations
Revenues from acquired properties
Revenues											30,601
Net Loss											(61,376)
Net income attributable to noncontrolling interests											3,381
Net Loss Attributable to CPA®:18 – Global											(57,995)
Business Combinations | Vopak
Revenues from acquired properties
Revenues												217
Net Loss												(7,864)
Net income attributable to noncontrolling interests												0
Net Loss Attributable to CPA®:18 – Global												(7,864)
Business Combinations | Bank Pekao
Revenues from acquired properties
Revenues													9,586
Net Loss													(12,920)
Net income attributable to noncontrolling interests													3,349
Net Loss Attributable to CPA®:18 – Global													(9,571)
Business Combinations | Siemens AS
Revenues from acquired properties
Revenues														5,437
Net Loss														(6,487)
Net income attributable to noncontrolling interests														0
Net Loss Attributable to CPA®:18 – Global														(6,487)
Business Combinations | Solo Cup
Revenues from acquired properties
Revenues															5,489
Net Loss															(4,004)
Net income attributable to noncontrolling interests															0
Net Loss Attributable to CPA®:18 – Global															(4,004)
Business Combinations | Other Business Combinations
Revenues from acquired properties
Revenues											9,872
Net Loss											(30,101)
Net income attributable to noncontrolling interests											32
Net Loss Attributable to CPA®:18 – Global											$ (30,069)