Loans Receivable and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Loans receivable and allowance for loan losses
Balance at the beginning of the period	$ 145,501	$ 157,185
Provision charged (creditied) to operations	9,126	10,000
Charge-offs	(13,354)	(19,075)
Recoveries	2,977	1,789
Balance at the end of the period	144,250	149,899
Consumer and Other Loans
Loans receivable and allowance for loan losses
Balance at the beginning of the period	6,316	3,800
Provision charged (creditied) to operations	844	384
Charge-offs	(906)	(600)
Recoveries	103	88
Balance at the end of the period	6,357	3,672
Mortgage Loans (Gross) | Residential
Loans receivable and allowance for loan losses
Balance at the beginning of the period	89,267	105,991
Provision charged (creditied) to operations	8,906	988
Charge-offs	(8,313)	(17,704)
Recoveries	1,686	1,623
Balance at the end of the period	91,546	90,898
Mortgage Loans (Gross) | Multi-Family
Loans receivable and allowance for loan losses
Balance at the beginning of the period	35,514	35,422
Provision charged (creditied) to operations	191	9,860
Charge-offs	(2,941)	(432)
Recoveries	1,188	77
Balance at the end of the period	33,952	44,927
Mortgage Loans (Gross) | Commercial Real Estate
Loans receivable and allowance for loan losses
Balance at the beginning of the period	14,404	11,972
Provision charged (creditied) to operations	(815)	(1,232)
Charge-offs	(1,194)	(339)
Recoveries		1
Balance at the end of the period	$ 12,395	$ 10,402