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Loans and Allowance for Credit Losses - Recorded Investment, Principal Balance and Related Allowance (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Financing Receivable, Impaired [Line Items]
Financing Receivable, Nonaccrual, Interest Income, Cash Basis Method	$ 0	$ 0
Financing Receivable, Nonaccrual, Interest Income Lost	3,300,000	$ 2,600,000
Currently performing impaired loans	$ 72,300,000		$ 36,300,000

X

- Definition

Refers to financing receivable impaired loans that are current and in performing status.

+ References

No definition available.

+ Details

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

X

- Definition

Financing Receivable, Nonaccrual, Interest Income, Cash Basis Method

+ References

No definition available.

+ Details

Name:	pnfp_FinancingReceivableNonaccrualInterestIncomeCashBasisMethod
Namespace Prefix:	pnfp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Financing Receivable, Nonaccrual, Interest Income Lost

+ References

No definition available.

+ Details

Name:	pnfp_FinancingReceivableNonaccrualInterestIncomeLost
Namespace Prefix:	pnfp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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