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Loans and Allowance for Credit Losses on Loans - Purchases, Sales, and Transfers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Receivables [Abstract]
Transfer of loans to held-for-investment	$ 0	$ 0	$ 0	$ 0
Purchases of loans held-for-investment	$ 0	$ 0	$ 0	$ 0

X

- Definition

Financing Receivable, Excluding Accrued Interest, Reclassification to Held-for-investment

+ References

No definition available.

+ Details

Name:	pcb_FinancingReceivableExcludingAccruedInterestReclassificationToHeldForInvestment
Namespace Prefix:	pcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount excluding accrued interest, of increase in financing receivable from purchase. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-11

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestPurchase
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_ReceivablesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration