Loans Receivable, net (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Loan loss reserves
Balance, beginning of year	$ 1,812	$ 1,609	$ 1,257
Provision for loan losses	2,505	826	1,019
Reduction of loan losses	(104)	(366)	(378)
Recoveries	(467)
Principal balances written-off, net	(333)	(257)	(473)
Consolidation of the 2000 Joint Venture and the 1998 Partnership reserves			184
Balance, end of year	3,413	1,812	1,609
Commercial Mortgage Loans [Member]
Loan loss reserves
Balance, beginning of year	1,329	1,303	1,055
Provision for loan losses	2,219	429	607
Reduction of loan losses	(70)	(342)	(309)
Recoveries	(467)
Principal balances written-off, net	(161)	(61)	(234)
Consolidation of the 2000 Joint Venture and the 1998 Partnership reserves			184
Balance, end of year	2,850	1,329	1,303
SBA 7(a) loans [Member]
Loan loss reserves
Balance, beginning of year	483	306	202
Provision for loan losses	286	397	412
Reduction of loan losses	(34)	(24)	(69)
Recoveries	0
Principal balances written-off, net	(172)	(196)	(239)
Consolidation of the 2000 Joint Venture and the 1998 Partnership reserves			0
Balance, end of year	$ 563	$ 483	$ 306