Loans Receivable and Allowance for Loan Losses (TDR Mortgage Loans, Subsequent Payment Default) (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 loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	11	5	12	9
Recorded Investment | $	$ 5,347	$ 2,688	$ 5,805	$ 3,397
Residential Mortgage Loans | Full documentation interest-only
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	4	0	4	2
Recorded Investment | $	$ 1,957	$ 0	$ 1,957	$ 399
Residential Mortgage Loans | Full documentation amortizing loans
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	1	2	2	2
Recorded Investment | $	$ 387	$ 447	$ 845	$ 447
Residential Mortgage Loans | Reduced documentation interest-only
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	4	1	4	3
Recorded Investment | $	$ 1,967	$ 579	$ 1,967	$ 889
Residential Mortgage Loans | Reduced documentation amortizing
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans		1		1
Recorded Investment | $		$ 93		$ 93
Multi-family
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans	2	0	2	0
Recorded Investment | $	$ 1,036	$ 0	$ 1,036	$ 0
Commercial real estate
Information about loans receivable by segment and class modified in troubled debt restructuring
Number of Loans		1		1
Recorded Investment | $		$ 1,569		$ 1,569