Loans Receivable (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended				9 Months Ended		12 Months Ended		9 Months Ended		12 Months Ended		9 Months Ended		12 Months Ended		9 Months Ended		12 Months Ended		9 Months Ended		12 Months Ended		9 Months Ended		12 Months Ended		9 Months Ended		12 Months Ended		3 Months Ended	1 Months Ended
	Sep. 30, 2014 type_of_financing class_of_financing		Dec. 31, 2013		Sep. 30, 2014 Norwalk, Connecticut [Member]		Dec. 31, 2013 Norwalk, Connecticut [Member]		Sep. 30, 2014 Homestead, Florida [Member]		Dec. 31, 2013 Homestead, Florida [Member]		Sep. 30, 2014 Westmont, Illinios [Member]		Dec. 31, 2013 Westmont, Illinios [Member]		Sep. 30, 2014 Southfield, Michigan [Member]		Dec. 31, 2013 Southfield, Michigan [Member]		Sep. 30, 2014 Austin, Texas [Member]		Dec. 31, 2013 Austin, Texas [Member]		Sep. 30, 2014 Kennewick, Washington [Member]		Dec. 31, 2013 Kennewick, Washington [Member]		Sep. 30, 2014 Other Loan Locations [Member]		Dec. 31, 2013 Other Loan Locations [Member]		Dec. 31, 2013 Loans Receivable [Member] Westmont, Illinios [Member]	Nov. 07, 2014 Subsequent Event [Member] Norwalk, Connecticut [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying amount of loans receivable, gross	$ 133,077	[1]	$ 99,443	[1]	$ 32,472	[1],[2]	$ 28,186	[1],[2]	$ 0	[1],[3]	$ 10,239	[1],[3]	$ 12,326	[1],[4]	$ 12,610	[1],[4]	$ 6,005	[1]	$ 6,610	[1]	$ 2,691	[1]	$ 2,389	[1]	$ 77,387	[1],[5]	$ 37,030	[1],[5]	$ 2,196	[1]	$ 2,379	[1]
Interest rate of mortgage loans					7.50%	[2]	7.50%	[2]	7.50%	[3]	7.50%	[3]	6.45%	[4]	6.45%	[4]	4.55%		4.55%		16.00%		16.00%		9.00%	[5]	9.00%	[5]	8.00%		8.00%			12.50%	[2]
Receivable impairment charge																																	13,939
Interest income from impaired loan													1,284
Average recorded investment													12,468
Unpaid principal balance													26,265
Maximum contracted lending amount																									$ 85,000
Number of types of financing receivable	2
Number of classes of financing receivable	1

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

[2] Subsequent to September 30, 2014, the Company extended the maturity date of the loan to December 1, 2014 and increased the interest rate to 12.5%.

[3] The loan was satisfied in August 2014.

[4] Borrower is delinquent on debt service payments. Tenant at office property collateral terminated its lease. The Company recognized an impairment of $13,939 during the fourth quarter of 2013. During the nine months ended September 30, 2014, the Company recognized $1,284 of interest income relating to the impaired loan and the loan had an average recorded investment value of $12,468. At September 30, 2014, the impaired loan receivable had a contractual unpaid balance of $26,265. Subsequent to September 30, 2014, the Company commenced a foreclosure proceeding.

[5] The Company is committed to lend up to $85,000.