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Loans Receivable - Nonaccrual Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Reserve For Uncollected Loan Interest | $ 50 | $ 103
Unpaid Principal Balance | 3,164 | 4,097
Recorded Investment | 1,636 | 2,390
Loans Past Due Over 90 Days, still accruing | 0 | 0
Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Unpaid Principal Balance | 6 |
One-to-four family residential real estate loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Unpaid Principal Balance | 2,800 | 3,413
Recorded Investment | 1,491 | 1,918
Loans Past Due Over 90 Days, still accruing | 0 | 0
One-to-four family residential real estate loans - non-owner occupied loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Unpaid Principal Balance | 262 | 308
Recorded Investment | 47 | 109
Loans Past Due Over 90 Days, still accruing | 0 | 0
Multi-family mortgage loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Unpaid Principal Balance | 96 | 376
Recorded Investment | 92 | 363
Loans Past Due Over 90 Days, still accruing | 0 | $ 0
Consumer loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment | 6 |
Loans Past Due Over 90 Days, still accruing | $ 0 |

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- Definition Financing Receivable, Nonaccrual + References No definition available. + Details
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- Definition Reserve for uncollected loan interest. + References No definition available. + Details
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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- Definition Financing receivables that are current. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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