Transactions with Related Parties (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Triple-net lease properties [Member]	Jun. 30, 2012 Bank Branches [Member]	Jun. 30, 2012 Inland Bank and Trust [Member]	Dec. 31, 2011 Inland Bank and Trust [Member]	Jun. 30, 2012 Inland Real Estate Corporation [Member]	Dec. 31, 2011 Inland Real Estate Corporation [Member]
Transaction with Related Parties (Textual) [Abstract]
Fee expenses percentage of gross operating income				2.90%	2.50%
Deposited in Inland Bank and Trust						$ 374	$ 373
Insurance premiums for Captive		6,206	4,643
Shares held in related entity								899,820	889,820
Equity interest in related entity								7,540	6,848
Transaction With Related Parties (Additional Textual) [Abstract]
Percentage of property management fee		4.50%
Percentage of oversight fee		1.00%
Reimbursement to property managers		7,126	7,731
Non-cumulative, non-compounded return on invested capital		5.00%
Percentage of Annual business management fee		1.00%
Payment of management fee to Business Manager, percentage of average invested assets		0.25%
Average invested assets		11,489,578	11,328,374
Business management fee		20,000	20,000
Business management fee net of investigation cost		19,993
Business management fee, percent type		0.174%	0.1765%
Investigation costs	$ 7
Payment to related party		0.20%