Transactions with Previously-Related Parties (Details) (Inland Group, Inc., USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	$ 840	$ 933	$ 2,663	$ 2,769
Unpaid amount due to previously-related parties	491		491		748
Reimbursement of third-party costs		346		904
Unpaid amount of reimbursement of third-party costs					276
Investment advisor
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	0	68	116	209
Unpaid amount due to previously-related parties	0		0		22
Loan servicing
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	52	45	129	143
Unpaid amount due to previously-related parties	0		0		0
Legal
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	65	69	229	271
Unpaid amount due to previously-related parties	161		161		110
Computer services
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	302	335	946	888
Unpaid amount due to previously-related parties	187		187		284
Office & facilities management services
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	14	22	53	66
Unpaid amount due to previously-related parties	22		22		22
Other service agreements
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	163	151	465	465
Unpaid amount due to previously-related parties	0		0		0
Office rent and reimbursements
Transactions with Previously-Related Parties
Amount of transactions with previously-related parties	244	243	725	727
Unpaid amount due to previously-related parties	$ 121		$ 121		$ 310