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Employment Contracts (Details) | 12 Months Ended
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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

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- 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

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- 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

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- References No definition available. + Details
Name: | us-gaap_CompensationRelatedCostsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration