Regulatory Matters - Schedule of Regulatory Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
PCB Bancorp
Actual
Common tier 1 capital (to risk-weighted assets), amount	$ 325,048	$ 303,423
Common tier 1 capital (to risk-weighted assets), ratio	0.1146	0.1144
Total capital (to risk-weighted assets), amount	$ 429,113	$ 404,383
Total capital (to risk-weighted assets), ratio	0.1513	0.1524
Tier 1 capital (to risk-weighted assets), amount	$ 394,189	$ 372,564
Tier 1 capital (to risk-weighted assets), ratio	0.1389	0.1404
Tier 1 capital (to average assets), amount	$ 394,189	$ 372,564
Tier 1 capital (to average assets), ratio	0.1189	0.1245
Minimum Capital Requirement
Common tier 1 capital (to risk-weighted assets), amount	$ 127,663	$ 119,387
Common tier 1 capital (to risk-weighted assets), ratio	4.50%	4.50%
Total capital (to risk-weighted assets), amount	$ 226,956	$ 212,243
Total capital (to risk-weighted assets), ratio	0.080	0.080
Tier 1 capital (to risk-weighted assets), amount	$ 170,217	$ 159,182
Tier 1 capital (to risk-weighted assets), ratio	0.060	0.060
Tier 1 capital (to average assets), amount	$ 132,582	$ 119,666
Tier 1 capital (to average assets), ratio	0.040	0.040
PCB Bank
Actual
Common tier 1 capital (to risk-weighted assets), amount	$ 382,620	$ 363,786
Common tier 1 capital (to risk-weighted assets), ratio	0.1349	0.1372
Total capital (to risk-weighted assets), amount	$ 417,545	$ 395,606
Total capital (to risk-weighted assets), ratio	0.1472	0.1492
Tier 1 capital (to risk-weighted assets), amount	$ 382,620	$ 363,786
Tier 1 capital (to risk-weighted assets), ratio	0.1349	0.1372
Tier 1 capital (to average assets), amount	$ 382,620	$ 363,786
Tier 1 capital (to average assets), ratio	0.1155	0.1216
Minimum Capital Requirement
Common tier 1 capital (to risk-weighted assets), amount	$ 127,616	$ 119,340
Common tier 1 capital (to risk-weighted assets), ratio	4.50%	4.50%
Total capital (to risk-weighted assets), amount	$ 226,873	$ 212,160
Total capital (to risk-weighted assets), ratio	0.080	0.080
Tier 1 capital (to risk-weighted assets), amount	$ 170,154	$ 159,120
Tier 1 capital (to risk-weighted assets), ratio	0.060	0.060
Tier 1 capital (to average assets), amount	$ 132,540	$ 119,636
Tier 1 capital (to average assets), ratio	0.040	0.040
To Be Well Capitalized Under Prompt Corrective Provisions
Common tier 1 capital (to risk-weighted assets), amount	$ 184,334	$ 172,380
Common tier 1 capital (to risk-weighted assets), ratio	6.50%	6.50%
Total capital (to risk-weighted assets), amount	$ 283,591	$ 265,200
Total capital (to risk-weighted assets), ratio	0.100	0.100
Tier 1 capital (to risk-weighted assets), amount	$ 226,873	$ 212,160
Tier 1 capital (to risk-weighted assets), ratio	0.080	0.080
Tier 1 capital (to average assets), amount	$ 165,675	$ 149,545
Tier 1 capital (to average assets), ratio	0.050	0.050

Common Equity Tier 1 Capital Required for Capital Adequacy to Risk Weighted Assets

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Compliance with Regulatory Capital Requirements under Banking Regulations, Actual [Abstract]

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Compliance with Regulatory Capital Requirements under Banking Regulations, Minimum Capital Requirements [Abstract]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B

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