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Employment Contracts (Details)	12 Months Ended
	Dec. 31, 2018
Compensation Related Costs [Abstract]
Number of senior executives that enter into automatic renewing employment agreements	5
Number of senior executive to whom entity is obligated to pay certain amount	4

X

- Definition

Refers to number of senior executive to whom entity is obligated to pay certain amount under Terminating events.

+ References

No definition available.

+ Details

Name:	pnfp_NumberOfSeniorExecutiveToWhomEntityIsObligatedToPayCertainAmount
Namespace Prefix:	pnfp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of senior executives that entered into automatic renewing employment agreements.

+ References

No definition available.

+ Details

Name:	pnfp_NumberOfSeniorExecutivesThatEnteredIntoAutomaticRenewingEmploymentAgreements
Namespace Prefix:	pnfp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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