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Loans and Allowance for Loan Losses - Amortized Cost of Collateral (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | $ 15,231 | $ 12,589
Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | 4,645 | 7,408
Multi-family Residential Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | 4,435 | 2,576
Commercial Real Estate | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | 1,254 | 2,994
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | 2,753 | 1,706
One-To-Four Family - Residential Portfolio Segment [Member] | Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | 6,789 | 5,313
Small Business Administration Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | 1,168 | 1,168
Commercial Business and Other Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type | $ 3,477 | 3,482
Taxi Medallion Portfolio Segment [Member] | Business Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Collateral Type |  | $ 2,758

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- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5086-111524 + Details
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