Loans Receivable and Allowance for Loan Losses (Details 12) (Mortgage Loans (Gross), USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 item	Sep. 30, 2012 item	Sep. 30, 2013 item	Sep. 30, 2012 item
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	45	5	62	13
Recorded Investment	$ 12,227	$ 3,721	$ 16,190	$ 7,866
Residential Mortgage Loans | Full documentation interest-only loans
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	14		22
Recorded Investment	3,365		5,343
Residential Mortgage Loans | Full documentation amortizing loans
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	8	1	10	1
Recorded Investment	2,159	485	2,589	485
Residential Mortgage Loans | Reduced documentation interest-only loans
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	20	3	24	5
Recorded Investment	5,729	1,174	6,707	1,821
Residential Mortgage Loans | Reduced documentation amortizing loans
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	2		5	5
Recorded Investment	303		880	1,817
Multi-Family
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	1	1	1	2
Recorded Investment	$ 671	$ 2,062	$ 671	$ 3,743