Loans Receivable (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Mar. 31, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Loans Receivable [Line Items]
Loans receivable	$ 371,408,000			$ 371,408,000		$ 263,187,000
Valuation allowance of loans receivable	5,754,000			5,754,000		19,805,000
Impaired loans, with a valuation allowance at cost	2,362,000			2,362,000		29,702,000
Impaired loans, without a valuation allowance at cost	30,299,000			30,299,000		30,357,000
Impaired loans, unpaid principal balance	35,660,000			35,660,000		93,922,000
Decrease in valuation allowance	(7,280,000)	(9,000)		(14,053,000)	541,000
Loans receivable charged off	54,000	9,000		139,000	9,000
Loans and Leases Receivable, Impaired, Nonperforming, Nonaccrual of Interest	31,000,000			31,000,000		30,000,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans			0	600,000
Aggregate Amortized Cost Of Six Largest Loans	217,000,000			217,000,000
Aggregate Fair Value Of Six Largest Loans	212,000,000			212,000,000
Aggregate Cost Basis Of Loans Considered Impaired	30,000,000			30,000,000
Debt Service Coverage Ratio	3.0			3.0
Specific Valuation Allowance [Member]
Loans Receivable [Line Items]
Valuation allowance of loans receivable	3,080,000			3,080,000		19,041,000
General Valuation Allowance [Member]
Loans Receivable [Line Items]
Valuation allowance of loans receivable	$ 2,674,000			$ 2,674,000		$ 764,000