Amount of fair value loss or gain for collateral dependent loans.

No definition available.

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Namespace Prefix:	plbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents fair value portion of impaired loans.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Fair value portion of other real estate.

+ References

No definition available.

+ Details

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Namespace Prefix:	plbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of other real estate owned and receivables.

+ References

No definition available.

+ Details

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Namespace Prefix:	plbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of fair value loss or gain for other real estate owned and receivables.

+ References

No definition available.

+ Details

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- Definition

Amount of fair value loss or gain for other real estate owned.

+ References

No definition available.

+ Details

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Namespace Prefix:	plbc_
Data Type:	xbrli:monetaryItemType
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- Definition

Amount of fair value loss or gain for receivables.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (c)(1)
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-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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-Name Accounting Standards Codification
-Section 50
-Paragraph 11
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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-Section 50
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
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-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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- Details

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Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details) - Fair Value, Nonrecurring [Member] - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Collateral dependent loans, fair value	$ 1,204
Collateral depended loans, total loss	1,040	$ 0
Collateral depended loans, total loss		$ 0
Total, fair value	114
Total, total loss	27
Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0
Total, fair value	0
Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	0
Total, fair value	0
Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	1,204
Total, fair value	114
Commercial Loans [Member]
Collateral dependent loans, fair value	55		$ 24
Collateral depended loans, total loss	150
Commercial Loans [Member] \| Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0		0
Commercial Loans [Member] \| Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	0		0
Commercial Loans [Member] \| Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	55		24
Agricultural Loans [Member]
Collateral dependent loans, fair value	1,149
Collateral depended loans, total loss	890
Agricultural Loans [Member] \| Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0
Agricultural Loans [Member] \| Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	0
Agricultural Loans [Member] \| Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	1,149
Real Estate Loan [Member]
Collateral depended loans, total loss	0
Real Estate Loan [Member] \| Residential Portfolio Segment [Member]
RE – Residential, fair value	91		91
Real Estate Loan [Member] \| Fair Value, Inputs, Level 1 [Member]
RE – Residential, fair value	0		0
Real Estate Loan [Member] \| Fair Value, Inputs, Level 2 [Member]
RE – Residential, fair value	0		0
Real Estate Loan [Member] \| Fair Value, Inputs, Level 3 [Member]
RE – Residential, fair value	91		$ 91
Equity Lines of Credit [Member] \| Residential Portfolio Segment [Member]
Equity lines of credit, fair value	23
Equity lines of credit, total loss	27
Equity Lines of Credit [Member] \| Fair Value, Inputs, Level 1 [Member] \| Residential Portfolio Segment [Member]
Equity lines of credit, fair value
Equity Lines of Credit [Member] \| Fair Value, Inputs, Level 2 [Member] \| Residential Portfolio Segment [Member]
Equity lines of credit, fair value
Equity Lines of Credit [Member] \| Fair Value, Inputs, Level 3 [Member] \| Residential Portfolio Segment [Member]
Equity lines of credit, fair value	$ 23