Equity Method Investment (Details) - USD ($)	3 Months Ended		9 Months Ended		61 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Feb. 28, 2020	Feb. 01, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Goodwill	$ 429,415,765		$ 429,415,765				$ 243,529,010
Technology, trade name and customer relationship intangibles	11,640,802		11,640,802				$ 2,893,072
Amortization of intangible assets	602,545	$ 236,163	1,057,372	$ 711,514
Bankers Healthcare Group, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage equity method investment						30.00%
Purchase price of acquired entity						$ 75,000,000
Goodwill	40,800,000		40,800,000
Technology, trade name and customer relationship intangibles	14,400,000		14,400,000
Income from Equity Method Investment			12,700,000
Amortization of intangible assets			1,600,000
Dividend to Pinnacle Bank			6,400,000
Summarized financial information [Abstract]
Assets	211,451		211,451
Liabilities	130,689		130,689
Equity interests	80,762		80,762
Total liabilities and equity	$ 211,451		211,451
Summarized financial information, Income statement [Abstract]
Revenues			102,574
Net income, pre tax			$ 53,002
Face amount						$ 40,000,000
Loan maturity term					5 years
Debt instrument, interest rate						2.95%