Mergers and Acquisition Mergers and Acquisition-Purchase Price Adjustment (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended			0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 01, 2013 First M&F Merger [Member]	Sep. 01, 2013 Securities [Member] First M&F Merger [Member]	Sep. 01, 2013 Loans, net of First M&F's allowance for loan losses [Member] First M&F Merger [Member]	Sep. 01, 2013 Fixed Assets [Member] First M&F Merger [Member]	Sep. 01, 2013 Core Deposits intangible, net of F&M's existing core deposit intangible [Member] First M&F Merger [Member]	Sep. 01, 2013 Other real estate owned [Member] First M&F Merger [Member]	Sep. 01, 2013 Deposits [Member] First M&F Merger [Member]	Sep. 01, 2013 Junior Subordinated Debt [Member] First M&F Merger [Member]	Sep. 01, 2013 Other Liabilities [Member] First M&F Merger [Member]	Sep. 01, 2013 Deferred Income Taxes [Member] First M&F Merger [Member]
Business Acquisition [Line Items]
Shares issued to common shareholders (shares)						6,175,586
Purchase price per share (usd per share)						$ 25.17
Value of stock paid						$ 155,439
Cash paid for fractional shares						17
Fair value of stock based compensation assumed						68
Deal charges	(3,763)	0	(4,148)	0		1,255
Total Purchase Price						156,779
Stockholders’ equity at 9/1/13						79,440
Assets, Fair Value Adjustment							253	(45,751)	(2,314)	21,158	(5,797)
Liabilities, Fair Value Adjustment												(3,207)	12,371	1,804	8,274
Total Net Assets Acquired						66,231
Goodwill resulting from merger	$ 275,328	$ 184,859	$ 275,328	$ 184,859	$ 184,859	$ 90,548