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Loans Receivable - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Loans individually evaluated for impairment by class loans |  |
Loan Balance |  | $ 3,491
Recorded Investment |  | 2,871
Partial Charge-off |  | 618
Average Investment in Impaired Loans |  | 4,164
Interest Income Recognized |  | 80
Loan Balance (With an allowance recorded) |  | 3,847
Recorded Investment (With an allowance recorded) |  | 3,141
Partial Charge-offs (With an allowance recorded) |  | 711
Allowance for loan losses (With an allowance recorded) | $ 0 | 27
Average Investment in Impaired Loans (With an allowance recorded) |  | 4,185
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method |  | 80
Impaired Loan, Total | 3,068 |
Recorded Investment, Total | 2,743 |
Partial Charge-offs, Total | 339 |
Average Investment in Impaired Loans, Total | 3,434 |
Interest Income Recognized, Total | 90 |
One-to-four family residential real estate loans [Member] |  |
Loans individually evaluated for impairment by class loans |  |
Loan Balance | 2,168 | 2,751
Recorded Investment | 1,835 | 2,172
Partial Charge-off | 339 | 575
Average Investment in Impaired Loans | 2,208 | 3,274
Interest Income Recognized | 51 | 41
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 | 620 | 654
Recorded Investment | 620 | 653
Partial Charge-off | 0 | 0
Average Investment in Impaired Loans | 637 | 795
Interest Income Recognized | 37 | 39
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 | 280 |
Recorded Investment | 288 |
Partial Charge-off | 0 |
Average Investment in Impaired Loans | 589 |
Interest Income Recognized | 2 |
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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