Agreements and Transactions with Related Parties (Narratives) (Details) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended									3 Months Ended										3 Months Ended		3 Months Ended		3 Months Ended			3 Months Ended
	Apr. 04, 2013	Feb. 28, 2014	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Long-term net lease	Mar. 31, 2014 Long-term net lease Current	Mar. 31, 2014 Long-term net lease Deferred	Mar. 31, 2014 Maximum	Mar. 31, 2014 Minimum	Mar. 31, 2014 CPA: 16 - Global Average invested assets	Jan. 31, 2013 CPA: 17 - Global	Mar. 31, 2014 CPA: 17 - Global Maximum Average equity value	Mar. 31, 2014 CPA: 17 - Global Minimum Average equity value	Mar. 31, 2014 CPA: 17 - Global Minimum Long-term net lease Average market value	Mar. 31, 2014 CPA:18 - Global	Dec. 31, 2013 CPA:18 - Global	Mar. 31, 2014 CPA:18 - Global Event I	Mar. 31, 2014 CPA:18 - Global Event II	Mar. 31, 2014 CPA:18 - Global Event III	Mar. 31, 2014 CPA:18 - Global Class A	Mar. 31, 2014 CPA:18 - Global Class C	Mar. 31, 2014 CPA:18 - Global Maximum Average invested assets	Mar. 31, 2014 CPA:18 - Global Maximum Event II	Mar. 31, 2014 CPA:18 - Global Minimum Average invested assets	Mar. 31, 2014 CPA:18 - Global Minimum Event II	Mar. 31, 2014 CWI	Dec. 31, 2013 CWI	Sep. 30, 2013 CWI	Mar. 31, 2014 CWI Lodging-related investments	Mar. 31, 2014 CWI Maximum Contract sales price of investment	Mar. 31, 2014 CWI Minimum Contract sales price of investment
Revenue from related parties
Percentage of asset management fees earned										0.50%		1.75%		0.50%								1.50%		0.50%					0.50%
Structuring revenue
Percentage of acquisition fees earned					4.50%	2.50%	2.00%					1.75%	0.00%																	6.00%	2.50%
Installment Period for Deferred Acquisition Fee Receivable			three years
Loan refinancing fee																										1.00%
Unpaid transaction fee interest rate								5.00%	2.00%
Reimbursed costs from affiliates and wholesaling revenue
Selling commission per share sold											$ 0.65									$ 0.7	$ 0.14					$ 0.70		$ 0.7
Dealer manager fee per share sold											$ 0.35									$ 0.3	$ 0.21					$ 0.30		$ 0.3
Shareholder servicing, percentage																					1.00%
Underwriting compensation limit, percentage																					10.00%
Maximum percent of offering proceeds																										2.00%
Maximum percentage of follow-on offering proceeds																										4.00%
Organization and offering costs incurred															$ 5,900,000											$ 11,300,000
Reimbursable offering costs																										10,200,000
Reimbursed offering costs															5,200,000											9,500,000
Aggregate gross proceeds threshold																	4.00%	2.00%	1.50%
Potential gross proceeds from offering																	500,000,000		750,000,000				750,000,000		500,000,000
Distributions Of Available Cash and Deferred Revenue Earned
Percentage of available cash distribution to advisor			10.00%
Other Transactions with Affiliates
Line of credit, maximum borrowing amount																100,000,000											50,000,000
Ownership interest in joint ventures								90.00%	3.00%
Share Purchase Agreement
Redemption value adjustment			0	40,000,000
Stock repurchased during period, shares	616,971	11,037
Repurchase of common stock	$ 40,000,000	$ 700,000	$ 678,000	$ 0
Common stock market value on exercise date	$ 64.83