Sale of Branches (Details) (USD $)			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Trust One Bank, Memphis, Tennessee [Member]	Jan. 17, 2014 Trust One Bank, Memphis, Tennessee [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans	$ 20,177,980,000	$ 19,750,238,000		$ 89,600,000
Deposits	20,993,467,000	20,876,790,000		191,300,000
Gain on sale of branches			$ 5,800,000