Employee Contract (Details)	12 Months Ended
Dec. 31, 2020 contract
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	5

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

No definition available.

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