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Loans Receivable - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Loans individually evaluated for impairment by class loans |  |
Loan Balance | $ 3,491 |
Recorded Investment | 2,854 |
Partial Charge-off | 618 |
Average Investment in Impaired Loans | 4,164 |
Interest Income Recognized | 80 |
Allowance for loan losses (With an allowance recorded) | 27 | $ 0
Impaired Loan, Total | 3,847 | 6,007
Recorded Investment, Total | 3,124 | 5,196
Partial Charge-offs, Total | 711 | 806
Average Investment in Impaired Loans, Total | 4,185 | 5,059
Interest Income Recognized, Total | 80 | 238
One-to-four family residential real estate loans [Member] |  |
Loans individually evaluated for impairment by class loans |  |
Loan Balance | 2,751 | 5,049
Recorded Investment | 2,155 | 4,248
Partial Charge-off | 575 | 806
Average Investment in Impaired Loans | 3,274 | 4,212
Interest Income Recognized | 41 | 197
Allowance for loan losses (With an allowance recorded) | 0 | 0
One-to-four family residential real estate loans - non-owner occupied loans [Member] |  |
Loans individually evaluated for impairment by class loans |  |
Loan Balance | 86 |
Recorded Investment | 46 |
Partial Charge-off | 43 |
Average Investment in Impaired Loans | 95 |
Interest Income Recognized | 0 |
Multi-family mortgage loans [Member] |  |
Loans individually evaluated for impairment by class loans |  |
Loan Balance | 654 | 958
Recorded Investment | 653 | 948
Partial Charge-off | 0 | 0
Average Investment in Impaired Loans | 795 | 847
Interest Income Recognized | 39 | 41
Allowance for loan losses (With an allowance recorded) | 0 | 0
Nonresidential real estate loans [Member] |  |
Loans individually evaluated for impairment by class loans |  |
Loan Balance (With an allowance recorded) | 356 |
Recorded Investment (With an allowance recorded) | 270 |
Partial Charge-offs (With an allowance recorded) | 93 |
Allowance for loan losses (With an allowance recorded) | 27 |
Average Investment in Impaired Loans (With an allowance recorded) | 21 |
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method | 0 |
Consumer loans [Member] |  |
Loans individually evaluated for impairment by class loans |  |
Allowance for loan losses (With an allowance recorded) | $ 0 | $ 0

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