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Credit Quality and Nonperforming Assets (Troubled Debt Restructurings, by Type of Loan Modification) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 1,999	$ 1,105	$ 2,581	$ 1,464
One to Four Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	806		806
Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	25	0	68
Consumer loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	10	0	80	0
Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,989	1,080	2,501	1,396
Real Estate Loans [Member] | Other Construction Land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	17	111
Real Estate Loans [Member] | One to Four Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	806	226	806	226
Real Estate Loans [Member] | Equity Line Of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,051	436	1,280	641
Real Estate Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	266	0
Real Estate Loans [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	132	418	132	418
Troubled Debt Restructurings Rate Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Consumer loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Real Estate Loans [Member] | Other Construction Land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Real Estate Loans [Member] | One to Four Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Real Estate Loans [Member] | Equity Line Of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Real Estate Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate Modifications [Member] | Real Estate Loans [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,051	589	1,317	948
Troubled Debt Restructurings Term Modifications [Member] | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	25	0	68
Troubled Debt Restructurings Term Modifications [Member] | Consumer loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	20	0
Troubled Debt Restructurings Term Modifications [Member] | Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,051	564	1,297	880
Troubled Debt Restructurings Term Modifications [Member] | Real Estate Loans [Member] | Other Construction Land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	17	111
Troubled Debt Restructurings Term Modifications [Member] | Real Estate Loans [Member] | One to Four Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Term Modifications [Member] | Real Estate Loans [Member] | Equity Line Of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	1,051	146	1,280	351
Troubled Debt Restructurings Term Modifications [Member] | Real Estate Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Term Modifications [Member] | Real Estate Loans [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	418	0	418
Troubled Debt Restructurings Interest Only Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	547	0	547	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Consumer loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	547	0	547	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Real Estate Loans [Member] | Other Construction Land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Real Estate Loans [Member] | One to Four Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	547	0	547	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Real Estate Loans [Member] | Equity Line Of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Real Estate Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Interest Only Modifications [Member] | Real Estate Loans [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0		0
Troubled Debt Restructurings Rate And Term Modifications [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	401	516	717	516
Troubled Debt Restructurings Rate And Term Modifications [Member] | Commercial And Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate And Term Modifications [Member] | Consumer loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	10	0	60	0
Troubled Debt Restructurings Rate And Term Modifications [Member] | Real Estate Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	391	516	657	516
Troubled Debt Restructurings Rate And Term Modifications [Member] | Real Estate Loans [Member] | Other Construction Land [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	0	0
Troubled Debt Restructurings Rate And Term Modifications [Member] | Real Estate Loans [Member] | One to Four Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	259	226	259	226
Troubled Debt Restructurings Rate And Term Modifications [Member] | Real Estate Loans [Member] | Equity Line Of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	290	0	290
Troubled Debt Restructurings Rate And Term Modifications [Member] | Real Estate Loans [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	0	0	266	0
Troubled Debt Restructurings Rate And Term Modifications [Member] | Real Estate Loans [Member] | Multifamily [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Modifications Post Modification Recorded Investment During Period	$ 132	$ 0	$ 132	$ 0

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