Loans Receivable and Allowance for Loan Losses (Details 9) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Residential	Dec. 31, 2013 Residential Full documentation interest-only loans	Dec. 31, 2012 Residential Full documentation interest-only loans	Dec. 31, 2013 Residential Full documentation amortizing loans	Dec. 31, 2012 Residential Full documentation amortizing loans	Dec. 31, 2013 Residential Reduced documentation interest-only loans	Dec. 31, 2012 Residential Reduced documentation interest-only loans	Dec. 31, 2013 Residential Reduced documentation amortizing loans	Dec. 31, 2012 Residential Reduced documentation amortizing loans	Dec. 31, 2013 Multi-Family	Dec. 31, 2012 Multi-Family	Dec. 31, 2013 Commercial Real Estate	Dec. 31, 2012 Commercial Real Estate
Financing Receivable, Impaired
Period after which loans are individually evaluated for impairment			180 days
Unpaid Principal Balance, Loans with an allowance recorded				$ 142,659	$ 10,740	$ 41,136	$ 6,122	$ 183,280	$ 12,893	$ 30,660	$ 3,889	$ 19,748	$ 19,704	$ 5,790	$ 10,835
Unpaid Principal Balance, Loans without an allowance recorded					122,275		23,489		166,477		23,419	39,871	44,341	19,988	13,256
Unpaid Principal Balance	483,132	457,440
Recorded Investment, Loans with an allowance recorded				109,877	10,740	36,091	6,122	140,357	12,893	25,605	3,889	19,748	19,704	5,790	10,835
Recorded Investment, Loans without an allowance recorded					86,607		17,962		116,514		17,419	32,790	36,412	14,264	7,809
Recorded Investment	384,522	346,906
Related Allowance	(21,531)	(5,046)		(6,019)	(241)	(2,458)	(347)	(7,673)	(277)	(2,202)	(136)	(2,877)	(2,576)	(302)	(1,469)
Net Investment, Loans with an allowance recorded				103,858	10,499	33,633	5,775	132,684	12,616	23,403	3,753	16,871	17,128	5,488	9,366
Net Investment, Loans without an allowance recorded					86,607		17,962		116,514		17,419	32,790	36,412	14,264	7,809
Net Investment	$ 362,991	$ 341,860