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Loans and Allowance for Credit Losses on Loans - Transactions In The Allowance For Loan Losses ("ALL") (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Balance | $ 3,287 | $ 3,642 | $ 3,581 | $ 3,590
Provision for credit losses | 35 |  | 35 | 60
Charge-offs | (4) |  | (4) | (9)
Recoveries | 1 | 2 | 2 | 3
Balance | 3,319 | 3,644 | 3,319 | 3,644
ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | (295) |
CRE [Member] |  |  |  |
Balance | 725 | 894 | 942 | 833
Provision for credit losses | 81 | 125 | 18 | 186
Balance | 806 | 1,019 | 806 | 1,019
CRE [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | (154) |
MF [Member] |  |  |  |
Balance | 49 | 78 | 54 | 80
Provision for credit losses |  | (21) | (6) | (23)
Balance | 49 | 57 | 49 | 57
MF [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | 1 |
C+I [Member] |  |  |  |
Balance | 281 | 218 | 184 | 194
Provision for credit losses | (4) | (11) | 4 | 13
Recoveries |  | 1 |  | 1
Balance | 277 | 208 | 277 | 208
C+I [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | 89 |
ADL [Member] |  |  |  |
Balance | 96 | 116 | 138 | 178
Provision for credit losses | (26) | (6) | (50) | (68)
Balance | 70 | 110 | 70 | 110
ADL [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | (18) |
RES [Member] |  |  |  |
Balance | 1,904 | 2,188 | 2,048 | 2,139
Provision for credit losses | 6 | (163) | 63 | (114)
Balance | 1,910 | 2,025 | 1,910 | 2,025
RES [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | (201) |
HELOC [Member] |  |  |  |
Balance | 88 | 62 | 81 | 63
Provision for credit losses | (3) | 25 | (3) | 24
Balance | 85 | 87 | 85 | 87
HELOC [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | 7 |
CON [Member] |  |  |  |
Balance | 119 | 86 | 100 | 75
Provision for credit losses | (7) | 24 | (3) | 43
Charge-offs | (4) |  | (4) | (9)
Recoveries | 1 | 1 | 2 | 2
Balance | 109 | 111 | 109 | 111
CON [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | 14 |
Unallocated [Member] |  |  |  |
Balance | 25 |  | 34 | 28
Provision for credit losses | (12) | 27 | 12 | (1)
Balance | $ 13 | $ 27 | 13 | $ 27
Unallocated [Member] | ASU 2016-13 [Member] | Impact of adopting ASC 326 [Member] |  |  |  |
Balance |  |  | $ (33) |

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481696/310-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 + Details
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