Regulatory Matters (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares
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 | $ / shares	$ 0.14
Pinnacle Financial [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to Pinnacle Financial by Pinnacle Bank	$ 12,900
Compliance with regulatory capital requirements [Abstract]
Common Equity Tier I capital to risk weighted assets:	4.50%
Actual Amount [Abstract]
Total capital to risk weighted assets:	$ 951,868
Tier I capital to risk weighted assets:	761,868
Common Equity Tier I Capital to risk weighted assets:	681,746
Tier I capital to average assets:	$ 761,868	[1]
Actual Ratio [Abstract]
Total capital to risk weighted assets:	11.10%
Tier I capital to risk weighted assets:	8.80%
Common Equity Tier I Capital to Risk Weighted Assets	7.90%
Tier I capital to average assets:	8.70%	[1]
Regulatory Minimum Capital Requirement Amount [Abstract]
Total capital to risk weighted assets:	$ 688,798
Tier I capital to risk weighted assets:	516,598
Common Equity Tier I Risk Based Capital to risk weighted assets:	387,449
Tier I capital to average assets:	$ 348,653	[1]
Regulatory Minimum Capital Requirement Ratio [Abstract]
Total capital to risk weighted assets:	8.00%
Tier I capital to risk weighted assets:	6.00%
Tier I capital to average assets:	4.00%	[1]
Regulatory Minimum To Be Well Capitalized Amount [Abstract]
Total capital to risk weighted assets:	$ 860,997
Tier I capital to risk weighted assets:	688,798
Common Equity Tier I capital to risk weighted assets:	559,648
Common Equity Tier I capital to risk weighted assets:	$ 559,648
Regulatory Minimum To Be Well Capitalized Ratio [Abstract]
Total capital to risk weighted assets:	10.00%
Tier I capital to risk weighted assets:	8.00%
Common Equity Tier I capital to risk weighted assets:	6.50%
Pinnacle Bank [Member]
Compliance with regulatory capital requirements [Abstract]
Common Equity Tier I capital to risk weighted assets:	4.50%
Actual Amount [Abstract]
Total capital to risk weighted assets:	$ 910,455
Tier I capital to risk weighted assets:	720,456
Common Equity Tier I Capital to risk weighted assets:	720,333
Tier I capital to average assets:	$ 720,456	[1]
Actual Ratio [Abstract]
Total capital to risk weighted assets:	10.60%
Tier I capital to risk weighted assets:	8.40%
Common Equity Tier I Capital to Risk Weighted Assets	8.40%
Tier I capital to average assets:	8.30%	[1]
Regulatory Minimum Capital Requirement Amount [Abstract]
Total capital to risk weighted assets:	$ 686,692
Tier I capital to risk weighted assets:	515,019
Common Equity Tier I Risk Based Capital to risk weighted assets:	386,264
Tier I capital to average assets:	$ 347,549	[1]
Regulatory Minimum Capital Requirement Ratio [Abstract]
Total capital to risk weighted assets:	8.00%
Tier I capital to risk weighted assets:	6.00%
Tier I capital to average assets:	4.00%	[1]
Regulatory Minimum To Be Well Capitalized Amount [Abstract]
Total capital to risk weighted assets:	$ 858,364
Tier I capital to risk weighted assets:	686,692
Common Equity Tier I capital to risk weighted assets:	557,937
Tier I capital to average assets:	434,436	[1]
Common Equity Tier I capital to risk weighted assets:	$ 557,937
Regulatory Minimum To Be Well Capitalized Ratio [Abstract]
Total capital to risk weighted assets:	10.00%
Tier I capital to risk weighted assets:	8.00%
Common Equity Tier I capital to risk weighted assets:	6.50%
Tier I capital to average assets:	5.00%	[1]

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