Loans Receivable (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013		Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes, Loans and Financing Receivable, Net	$ 88,994		$ 72,540
Loans and Leases Receivable, Gross, Carrying Amount	88,994	[1]	72,540	[1]
Number Of Types Of Financing Receivable	2
Number Of Classes Of Financing Receivable	1
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with Imputed Interest, Effective Yield (Interest Rate)	4.60%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivable with Imputed Interest, Effective Yield (Interest Rate)	20.00%
Norwalk, Connecticut [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	20,262	[1],[2]	3,479	[1],[2]
Mortgage Loans on Real Estate, Interest Rate	7.50%	[2]
Loans and Leases Receivable, Maximum Contracted Amount of Borrowing	32,600
Homestead Florida [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	8,646	[1],[3]	8,036	[1],[3]
Mortgage Loans on Real Estate, Interest Rate	7.50%	[3]
Loans and Leases Receivable, Maximum Contracted Amount of Borrowing	10,660
Schaumburg, Illinios [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	21,579	[1],[4]	21,885	[1],[4]
Mortgage Loans on Real Estate, Interest Rate	20.00%	[4]
Loans and Leases Receivable, Impaired, Troubled Debt, Interest Income	1,911		2,647
Westmont, Illinios [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	26,721	[1]	26,902	[1]
Mortgage Loans on Real Estate, Interest Rate	6.45%
Southfield, Michigan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	6,994	[1]	7,364	[1]
Mortgage Loans on Real Estate, Interest Rate	4.55%
Austin, Texas [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,206	[1]	2,038	[1]
Mortgage Loans on Real Estate, Interest Rate	16.00%
Other Loan Locations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	$ 2,586	[1]	$ 2,836	[1]
Mortgage Loans on Real Estate, Interest Rate	8.00%

[1] Loan carrying value includes accrued interest and is net of origination costs and fee eliminations, if any.

[2] The Company is committed to lend up to $32,600.

[3] The Company is committed to lend up to $10,660.

[4] Loan is in default. The Company has obtained a foreclosure judgment but has not foreclosed as of June 30, 2013. The Company did not record interest income of $1,911 and $2,647 during the six months ended June 30, 2013 and the year ended December 31, 2012, respectively. The Company believes the office property collateral has an estimated fair value in excess of the Company's investment.