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Deposits - Additional Information (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deposits [Line Items]
Deposits	$ 945,109,000	$ 722,030,000
Certificates of deposit with minimum denomination	250,000
Time deposits	251,443,000
Deposits brokered	31,700,000	30,600,000
Certificate Of Deposit Account Registry Service [Member]
Deposits [Line Items]
Time deposits	2,200,000	2,200,000
Certificate Of Deposit Listing Service [Member]
Deposits [Line Items]
Deposits	14,800,000	19,200,000
Certificates Of Deposit [Member]
Deposits [Line Items]
Deposits	$ 95,700,000	$ 82,800,000

X

- Definition

Certificates of deposit with minimum denomination.

+ References

No definition available.

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X

- Definition

Deposits.

+ References

No definition available.

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X

- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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- Definition

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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X

- Definition

Amount of time deposit liabilities, including certificates of deposit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818

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