Stock Options and Restricted Shares - Common Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2017		Dec. 31, 2016
Common stock options and stock appreciation rights
Number
Outstanding, beginning balance (in shares)		550,490
Granted (in shares)		0
Exercised (in shares)	[1]	(184,181)
Forfeited (in shares)		0
Outstanding, ending balance (in shares)		366,309		550,490
Weighted- Average Exercise Price
Outstanding, beginning balance (in dollars per share)		$ 20.75
Outstanding, ending balance (in dollars per share)		$ 21.23		$ 20.75
Additional disclosures
Options exercisable (in shares)		366,309
Weighted- average exercise price of options exercisable (in dollars per share)		$ 21.23
Weighted-average contractual remaining term for options outstanding		3 years 2 months 5 days		2 years 7 months 10 days
Weighted-average contractual remaining term for options exercisable		3 years 2 months 5 days
Aggregate intrinsic value		$ 15,228	[2]	$ 26,728	[3]
Aggregate intrinsic value of options exercisable	[2]	$ 15,228
Quoted closing price of common stock (in dollars per share)		$ 62.80		$ 69.30
Number of awards used in aggregate intrinsic value (in shares)		366,309		550,490
Stock swap transaction
Number
Exercised (in shares)	[4]	(750)
Stock swap transaction | Common Stock
Number
Exercised (in shares)		(277)

[1] Includes 750 stock options which were exercised in a stock swap transaction which settled in 277 shares of Pinnacle Financial common stock

[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 $62.80 per common share at June 30, 2017 for the 366,309 options that were in-the-money at June 30, 2017.

[3] 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 $69.30 per common share at December 31, 2016 for the 550,490 options that were in-the-money at December 31, 2016.

[4] Restrictions on half of the shares previously converted to RSAs will lapse commensurate with the filing of the Form 10-K for the year ended December 31, 2017 and 2018, respectively.