Stock Options and Restricted Shares - Common Stock Options (Details) - Common stock options - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2023		Dec. 31, 2022
Number
Outstanding, beginning balance (in shares)		40,188
Granted (in shares)		0
Exercised (in shares)		(39,758)
Forfeited (in shares)		0
Outstanding, ending balance (in shares)		430		40,188
Additional disclosures
Options exercisable (in shares)		430
Weighted-average exercise price of options outstanding (in dollars per share)		$ 25.00		$ 25.00
Weighted-average contractual remaining term for options outstanding		1 year 8 months 4 days		3 months 29 days
Aggregate intrinsic value		$ 13	[1]	$ 1,945	[2]
Weighted- average exercise price of options exercisable (in dollars per share)		$ 25.00
Weighted-average contractual remaining term for options exercisable		1 year 8 months 4 days
Aggregate intrinsic value of options exercisable	[1]	$ 13

[1] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $55.16 per common share at March 31, 2023 for the 430 options that were in-the-money at March 31, 2023.

[2] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of Pinnacle Financial common stock of $73.40 per common share at December 31, 2022 for the 40,188 options that were in-the-money at December 31, 2022.