Loans Receivable and Allowance for Loan Losses (TDR Mortgage Loans Receivable) (Details) - Mortgage Loans $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) loan	Mar. 31, 2015 USD ($) loan
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	12	16
Pre- Modification Recorded Investment	$ 4,165	$ 8,683
Recorded investment	$ 4,149	$ 8,611
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	4
Pre- Modification Recorded Investment	$ 888	$ 2,035
Recorded investment	$ 889	$ 2,030
Residential Mortgage Loans | Full documentation amortizing
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	2	6
Pre- Modification Recorded Investment	$ 591	$ 2,059
Recorded investment	$ 589	$ 2,016
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	3	4
Pre- Modification Recorded Investment	$ 1,691	$ 1,687
Recorded investment	$ 1,686	$ 1,687
Residential Mortgage Loans | Reduced documentation amortizing
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	3	0
Pre- Modification Recorded Investment	$ 995	$ 0
Recorded investment	$ 985	$ 0
Commercial Real Estate
Information about mortgage loans receivable by segment and class modified in troubled debt restructuring
Number of Loans | loan	0	2
Pre- Modification Recorded Investment	$ 0	$ 2,902
Recorded investment	$ 0	$ 2,878