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Loans Receivable And Allowance For Loan Losses - Land and Commercial Business Loans (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2018 USD ($) contract | Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Modifications, Recorded Investment | $ 3,278 | $ 3,249
Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 |
Pre-modification TDR balance | $ 427 |
Post-modification TDR balance | 338 |
Financing Receivable, Modifications, Recorded Investment | 323 |
Commercial business loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Modifications, Recorded Investment | $ 170 | $ 162
Commercial business loans | Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 2 |
Pre-modification TDR balance | $ 183 |
Post-modification TDR balance | 183 |
Financing Receivable, Modifications, Recorded Investment | 170 |
Mortgage loans, land |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Modifications, Recorded Investment | $ 153 |
Mortgage loans, land | Portfolio Segment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivable, Modifications, Number of Contracts | contract | 1 |
Pre-modification TDR balance | $ 244 |
Post-modification TDR balance | 155 |
Financing Receivable, Modifications, Recorded Investment | $ 153 |

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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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