Loans Receivable and Allowance for Loan Losses (TDR Mortgage Loans Receivable) (Details) - Mortgage loans (gross) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($) loan	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($) loan
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	12	13	28	35
Pre-modification recorded investment	$ 3,005	$ 4,829	$ 11,688	$ 12,907
Recorded investment	$ 2,993	$ 4,824	$ 11,572	$ 12,253
Residential Mortgage Loans | Full documentation interest-only
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	4	7	8	18
Pre-modification recorded investment	$ 1,315	$ 2,940	$ 3,350	$ 7,797
Recorded investment	$ 1,309	$ 2,939	$ 3,340	$ 7,374
Residential Mortgage Loans | Full documentation amortizing loans
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	5	0	11	3
Pre-modification recorded investment	$ 1,142	$ 0	$ 3,201	$ 519
Recorded investment	$ 1,136	$ 0	$ 3,126	$ 489
Residential Mortgage Loans | Reduced documentation interest-only
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	1	4	5	8
Pre-modification recorded investment	$ 209	$ 1,278	$ 1,896	$ 2,301
Recorded investment	$ 209	$ 1,277	$ 1,903	$ 2,290
Residential Mortgage Loans | Reduced documentation amortizing
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	2	0	2	2
Pre-modification recorded investment	$ 339	$ 0	$ 339	$ 317
Recorded investment	$ 339	$ 0	$ 339	$ 262
Multi-family
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	0	1	0	2
Pre-modification recorded investment	$ 0	$ 357	$ 0	$ 1,060
Recorded investment	$ 0	$ 357	$ 0	$ 946
Commercial real estate
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	0	1	2	2
Pre-modification recorded investment	$ 0	$ 254	$ 2,902	$ 913
Recorded investment	$ 0	$ 251	$ 2,864	$ 892