Loans Receivable and Allowance for Loan Losses (TDR Mortgage Loans Receivable) (Details) (Mortgage loans (gross), USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014 loan	Sep. 30, 2013 loan	Sep. 30, 2014 loan	Sep. 30, 2013 loan
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	16	29	51	75
Pre-modification recorded investment	$ 8,324	$ 16,238	$ 21,230	$ 34,862
Recorded investment	7,933	15,002	20,109	32,941
Residential Mortgage Loans | Full documentation interest-only
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	3	7	21	18
Pre-modification recorded investment	1,447	2,128	9,244	4,579
Recorded investment	1,447	2,127	8,776	4,577
Residential Mortgage Loans | Full documentation amortizing loans
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans		1	3	6
Pre-modification recorded investment		161	519	1,662
Recorded investment		161	485	1,682
Residential Mortgage Loans | Reduced documentation interest-only
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	9	10	17	28
Pre-modification recorded investment	3,585	3,107	5,885	8,957
Recorded investment	3,581	3,096	5,860	8,921
Residential Mortgage Loans | Reduced documentation amortizing
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	1	2	3	8
Pre-modification recorded investment	282	387	599	2,470
Recorded investment	281	386	541	2,408
Multi-family
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	2	5	4	8
Pre-modification recorded investment	1,441	3,967	2,501	6,751
Recorded investment	1,055	3,774	1,994	6,228
Commercial real estate
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	1	4	3	7
Pre-modification recorded investment	1,569	6,488	2,482	10,443
Recorded investment	$ 1,569	$ 5,458	$ 2,453	$ 9,125