Regulatory Matters (Details) - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Preceding period of retained earnings used in calculation of dividend payable		2 years
Retained earnings		$ 381,072,505	$ 278,573,408
Pinnacle Financial [Member]
Compliance with regulatory capital requirements [Abstract]
Common Equity Tier I capital to risk weighted assets:	[1]	4.50%	4.50%
Actual Amount [Abstract]
Total capital to risk weighted assets:		$ 1,211,105,000	$ 883,085,000
Tier I capital to risk weighted assets:		882,654,000	756,316,000	[1]
Common Equity Tier I Capital to risk weighted assets	[1]	802,532,000	676,316,000
Tier I capital to average assets (*):	[1]	$ 882,654,000	$ 756,316,000
Actual Ratio [Abstract]
Total capital to risk weighted assets:		11.90%	11.20%
Tier I capital to risk weighted assets:		8.60%	9.60%	[1]
Common Equity Tier I Capital to Risk Weighted Assets	[1]	7.90%	8.60%
Tier I capital to average assets (*):	[1]	8.60%	9.40%
Regulatory Minimum Capital Requirement Amount [Abstract]
Total capital to risk weighted assets:		$ 816,857,000	$ 628,500,000
Tier I capital to risk weighted assets:		612,643,000	471,375,000	[1]
Common Equity Tier I Risk Based Capital to risk weighted assets	[1]	459,482,000	353,531,000
Tier I capital to average assets (*):	[1]	$ 412,902,000	$ 322,920,000
Regulatory Minimum Capital Requirement Ratio [Abstract]
Total capital to risk weighted assets:		8.00%	8.00%
Tier I capital to risk weighted assets:		6.00%	6.00%	[1]
Common Equity Tier I Risk Based Capital to risk weighted assets:	[1]	4.50%	4.50%
Tier I capital to average assets (*):	[1]	4.00%	4.00%
Regulatory Minimum To Be Well Capitalized Amount [Abstract]
Total capital to risk weighted assets:		$ 1,021,071,000	$ 785,624,000
Tier I capital to risk weighted assets:		816,857,000	628,500,000	[1]
Common Equity Tier I capital to risk weighted assets	[1]	$ 663,696,000	$ 510,656,000
Regulatory Minimum To Be Well Capitalized Ratio [Abstract]
Total capital to risk weighted assets:		10.00%	10.00%
Tier I capital to risk weighted assets:		8.00%	8.00%	[1]
Common Equity Tier I capital to risk weighted assets:	[1]	6.50%	6.50%
Pinnacle Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Retained earnings		$ 239,500,000
Compliance with regulatory capital requirements [Abstract]
Common Equity Tier I capital to risk weighted assets:	[1]	4.50%	4.50%
Actual Amount [Abstract]
Total capital to risk weighted assets:		$ 1,136,782,000	$ 830,863,000
Tier I capital to risk weighted assets:		949,193,000	704,095,000	[1]
Common Equity Tier I Capital to risk weighted assets	[1]	949,070,000	704,095,000
Tier I capital to average assets (*):	[1]	$ 949,193,000	$ 704,095,000
Actual Ratio [Abstract]
Total capital to risk weighted assets:		11.20%	10.60%
Tier I capital to risk weighted assets:		9.30%	9.00%	[1]
Common Equity Tier I Capital to Risk Weighted Assets	[1]	9.30%	9.00%
Tier I capital to average assets (*):	[1]	9.20%	8.80%
Regulatory Minimum Capital Requirement Amount [Abstract]
Total capital to risk weighted assets:		$ 814,254,000	$ 626,486,000
Tier I capital to risk weighted assets:		610,690,000	469,864,000	[1]
Common Equity Tier I Risk Based Capital to risk weighted assets	[1]	458,018,000	352,398,000
Tier I capital to average assets (*):	[1]	$ 412,124,000	$ 321,991,000
Regulatory Minimum Capital Requirement Ratio [Abstract]
Total capital to risk weighted assets:		8.00%	8.00%
Tier I capital to risk weighted assets:		6.00%	6.00%	[1]
Common Equity Tier I Risk Based Capital to risk weighted assets:	[1]	4.50%	4.50%
Tier I capital to average assets (*):	[1]	4.00%	4.00%
Regulatory Minimum To Be Well Capitalized Amount [Abstract]
Total capital to risk weighted assets:		$ 1,017,817,000	$ 783,107,000
Tier I capital to risk weighted assets:		814,254,000	626,486,000	[1]
Common Equity Tier I capital to risk weighted assets	[1]	661,581,000	509,020,000
Tier I capital to average assets (*):	[1]	$ 515,155,000	$ 402,489,000
Regulatory Minimum To Be Well Capitalized Ratio [Abstract]
Total capital to risk weighted assets:		10.00%	10.00%
Tier I capital to risk weighted assets:		8.00%	8.00%	[1]
Common Equity Tier I capital to risk weighted assets:	[1]	6.50%	6.50%
Tier I capital to average assets (*):	[1]	5.00%	5.00%

[1] Average assets for the above calculations were based on the most recent quarter.