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Segment Reporting - Additional Information (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 Segment | Dec. 31, 2019
Segment Reporting Disclosure [Line Items] |  |
Number of business segments | 6 |
Number of operating segments | 4 |
Number of non-operating segments | 2 |
Loan outstanding percent | 9.00% |
Capital ratios for operating segments | 11.9 | 13.8
Operating Segments [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Capital ratios for operating segments | 20 |
Swimming Pools [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 27.00% |
Roofs [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 24.00% |
Windows [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 13.00% |
Solar Panels [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 8.00% |
Other Product Lines [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 8.00% |
Texas [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 15.00% |
Florida [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 9.00% |
California [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Loan outstanding percent | 10.00% |
Geographic Concentration Risk [Member] | Recreational Vehicles [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Aggregate percentage of loans lending | 60.00% |
Geographic Concentration Risk [Member] | Boats [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Aggregate percentage of loans lending | 19.00% |
Geographic Concentration Risk [Member] | Trailers [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Aggregate percentage of loans lending | 12.00% |
Geographic Concentration Risk [Member] | Midwest [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Aggregate percentage of loans lending | 53.00% |
Geographic Concentration Risk [Member] | New York City [Member] |  |
Segment Reporting Disclosure [Line Items] |  |
Aggregate percentage of loans lending | 89.00% |

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- Definition Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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