v3.19.1

Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan	Dec. 31, 2016 USD ($) loan
Loans Modified as TDRs as of Period End [Abstract]
Accruing	$ 432,000	$ 592,000
Nonaccrual	131,000	1,675,000
Total	563,000	2,267,000
Commitments to lend to customers with outstanding loans classified as TDRs	0	0
TDRs, allowance for credit losses	$ 86,000	$ 208,000
Loans Modified as TDRs During the Period [Abstract]
Number of Loans | loan	0	4	3
Pre-Modification Recorded Investment		$ 586,000	$ 148,000
Post-Modification Recorded Investment		$ 542,000	$ 140,000
Loans Modified as TDRs, Subsequent Payment Defaults [Abstract]
Number of Loans | loan	0	0	1
Recorded Investment at Date of Default	$ 0	$ 0	$ 23,000
Real Estate | Commercial property
Loans Modified as TDRs as of Period End [Abstract]
Accruing	0	0
Nonaccrual	0	318,000
Total	0	$ 318,000
Loans Modified as TDRs During the Period [Abstract]
Number of Loans | loan		1	0
Pre-Modification Recorded Investment		$ 312,000	$ 0
Post-Modification Recorded Investment		301,000	$ 0
Real Estate | SBA loan pool securities
Loans Modified as TDRs as of Period End [Abstract]
Accruing	315,000	334,000
Nonaccrual	0	1,039,000
Total	315,000	1,373,000
Commercial and Industrial | Commercial term
Loans Modified as TDRs as of Period End [Abstract]
Accruing	68,000	195,000
Nonaccrual	0	4,000
Total	68,000	199,000
Commercial and Industrial | Commercial lines of credit
Loans Modified as TDRs as of Period End [Abstract]
Accruing	0	0
Nonaccrual	0	10,000
Total	0	$ 10,000
Loans Modified as TDRs During the Period [Abstract]
Number of Loans | loan		0	1
Pre-Modification Recorded Investment		$ 0	$ 120,000
Post-Modification Recorded Investment		0	$ 115,000
Commercial and Industrial | SBA commercial term
Loans Modified as TDRs as of Period End [Abstract]
Accruing	49,000	63,000
Nonaccrual	131,000	304,000
Total	$ 180,000	$ 367,000
Loans Modified as TDRs During the Period [Abstract]
Number of Loans | loan		3	2
Pre-Modification Recorded Investment		$ 274,000	$ 28,000
Post-Modification Recorded Investment		$ 241,000	$ 25,000
Loans Modified as TDRs, Subsequent Payment Defaults [Abstract]
Number of Loans | loan	0	0	1
Recorded Investment at Date of Default	$ 0	$ 0	$ 23,000

X

- Definition

Financing Receivable, Modifications, Allowance For Credit Losses

+ References

No definition available.

+ Details

Name:	pcb_FinancingReceivableModificationsAllowanceForCreditLosses
Namespace Prefix:	pcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Financing Receivable, Modifications, Commitments

+ References

No definition available.

+ Details

Name:	pcb_FinancingReceivableModificationsCommitments
Namespace Prefix:	pcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Financing Receivable, Modifications, Recorded Investment, Accruing

+ References

No definition available.

+ Details

Name:	pcb_FinancingReceivableModificationsRecordedInvestmentAccruing
Namespace Prefix:	pcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Financing Receivable, Modifications, Recorded Investment, Nonaccrual

+ References

No definition available.

+ Details

Name:	pcb_FinancingReceivableModificationsRecordedInvestmentNonaccrual
Namespace Prefix:	pcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Loans Modified as TDRs During the Period [Abstract]

+ References

No definition available.

+ Details

Name:	pcb_LoansModifiedasTDRsDuringthePeriodAbstract
Namespace Prefix:	pcb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loans Modified as TDRs, Subsequent Payment Defaults [Abstract]

+ References

No definition available.

+ Details

Name:	pcb_LoansModifiedasTDRsSubsequentPaymentDefaultsAbstract
Namespace Prefix:	pcb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loans Modified as TDRs as of Period End [Abstract]

+ References

No definition available.

+ Details

Name:	pcb_LoansModifiedasTDRsasofPeriodEndAbstract
Namespace Prefix:	pcb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=pcb_RealEstateLoanPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pcb_SBAPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=pcb_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pcb_CommercialTermLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pcb_CommercialLinesofCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=pcb_SBACommercialTermLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: