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Troubled Debt Restructurings (Loans By Class of Financing Receivable Modified as TDRs) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) contract | Dec. 31, 2017 USD ($) contract | Dec. 31, 2016 USD ($) contract
Troubled Debt Restructuring, Subsequent Periods [Line Items] |  |  |
Number of Contracts | 19 | 21 |
Troubled Debt Restructurings Within Previous Twelve Months [Member] |  |  |
Troubled Debt Restructuring, Subsequent Periods [Line Items] |  |  |
Number of Contracts | 0 | 0 | 2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ | $ 0 | $ 0 | $ 588
Residential Single Family [Member] | Troubled Debt Restructurings Within Previous Twelve Months [Member] |  |  |
Troubled Debt Restructuring, Subsequent Periods [Line Items] |  |  |
Number of Contracts |  |  | 2
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ |  |  | $ 588

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- Definition Troubled Debt Restructuring, Subsequent Periods [Line Items] + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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