Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Property, Plant and Equipment [Line Items]
Earned asset management fees	$ 1,228	$ 1,302	$ 2,513	$ 2,600
Eliminated management fee income from securitizations	$ 906	$ 924	$ 1,876	$ 1,883
Buildings and improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, useful lives			40 years
Buildings and improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, useful lives			30 years
Furniture, fixtures, and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, useful lives			10 years
Furniture, fixtures, and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, useful lives			5 years