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Loans and Allowance for Loan Losses - Summary of TDRs (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) TDR	Dec. 31, 2019 USD ($) TDR
Recreation [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of Loans | TDR	77	294
Pre- Modification Investment	$ 1,053	$ 4,433
Post- Modification Investment	$ 749	$ 2,831
Commercial Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of Loans | TDR	1
Pre- Modification Investment	$ 1,821
Post- Modification Investment	$ 1,821
Medallion [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Number of Loans | TDR	59	71
Pre- Modification Investment	$ 33,505	$ 31,376
Post- Modification Investment	$ 33,505	$ 31,385

X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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+ References

No definition available.

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