Regulatory Matters (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Preceding period of retained earnings used in calculation of dividend payable	2 years
Dividends Payable, Amount Per Share	$ 0.08
Pinnacle Financial [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to Pinnacle Financial by Pinnacle Bank	$ 8,970,000
Amount available for dividend distribution without prior approval from TDFI	90,700,000
Actual Amount [Abstract]
Total capital to risk weighted assets:	657,333,000
Tier I capital to risk weighted assets:	595,690,000
Tier I capital to average assets:	595,690,000	[1]
Actual Ratio [Abstract]
Total capital to risk weighted assets: (in hundredths)	13.40%
Tier I capital to risk weighted assets: (in hundredths)	12.10%
Tier I capital to average assets: (in hundredths)	11.00%	[1]
Regulatory Minimum Capital Requirement Amount [Abstract]
Total capital to risk weighted assets:	393,991,000
Tier I capital to risk weighted assets:	196,995,000
Tier I capital to average assets:	217,121,000	[1]
Regulatory Minimum Capital Requirement Ratio [Abstract]
Total capital to risk weighted assets: (in hundredths)	8.00%
Tier I capital to risk weighted assets: (in hundredths)	4.00%
Tier I capital to average assets: (in hundredths)	4.00%	[1]
Regulatory Minimum To Be Well Capitalized Amount [Abstract]
Total capital to risk weighted assets:	493,150,000
Tier I capital to risk weighted assets:	295,890,000
Regulatory Minimum To Be Well Capitalized Ratio [Abstract]
Total capital to risk weighted assets: (in hundredths)	10.00%
Tier I capital to risk weighted assets: (in hundredths)	6.00%
Pinnacle Bank [Member]
Actual Amount [Abstract]
Total capital to risk weighted assets:	627,449,000
Tier I capital to risk weighted assets:	565,975,000
Tier I capital to average assets:	565,975,000	[1]
Actual Ratio [Abstract]
Total capital to risk weighted assets: (in hundredths)	12.80%
Tier I capital to risk weighted assets: (in hundredths)	11.50%
Tier I capital to average assets: (in hundredths)	10.50%	[1]
Regulatory Minimum Capital Requirement Amount [Abstract]
Total capital to risk weighted assets:	196,447,000
Tier I capital to risk weighted assets:	196,447,000
Tier I capital to average assets:	216,416,000	[1]
Regulatory Minimum Capital Requirement Ratio [Abstract]
Total capital to risk weighted assets: (in hundredths)	8.00%
Tier I capital to risk weighted assets: (in hundredths)	4.00%
Tier I capital to average assets: (in hundredths)	4.00%	[1]
Regulatory Minimum To Be Well Capitalized Amount [Abstract]
Total capital to risk weighted assets:	295,077,000
Tier I capital to risk weighted assets:	295,077,000
Tier I capital to average assets:	$ 270,520,000	[1]
Regulatory Minimum To Be Well Capitalized Ratio [Abstract]
Total capital to risk weighted assets: (in hundredths)	10.00%
Tier I capital to risk weighted assets: (in hundredths)	6.00%
Tier I capital to average assets: (in hundredths)	5.00%	[1]

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