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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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