Mergers and Acquisition-Purchase Price Adjustment (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Sep. 01, 2013 First M&F Merger		Sep. 01, 2013 Securities First M&F Merger	Sep. 01, 2013 Loans, net of First M&F's allowance for loan losses First M&F Merger		Sep. 01, 2013 Fixed assets First M&F Merger	Sep. 01, 2013 Core deposits intangible, net of First M&F’s existing core deposit intangible First M&F Merger	Sep. 01, 2013 Other real estate owned First M&F Merger		Sep. 01, 2013 Other Assets First M&F Merger		Sep. 01, 2013 Deposits First M&F Merger	Sep. 01, 2013 Junior Subordinated Debt First M&F Merger	Sep. 01, 2013 Other liabilities First M&F Merger	Sep. 01, 2013 Deferred income taxes First M&F Merger
Business Acquisition [Line Items]
Shares issued to common shareholders (shares)				6,175,576
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	(195)	0		1,310
Total Purchase Price				156,834
Stockholders’ equity at 9/1/13				79,440
Assets, Fair Value Adjustment						253	(45,751)	[1]	(3,070)	21,158	(5,797)	[1]	(443)	[1]
Liabilities, fair value adjustment															(3,207)	12,371	1,748	8,799
Total Net Assets Acquired				65,501
Goodwill resulting from merger	$ 276,144	$ 184,779	$ 276,100	$ 91,333	[2]

[1] The fair value adjustments to acquired loans and other real estate owned reflect management’s expectations to more aggressively market and liquidate problem assets quickly.

[2] The goodwill resulting from the merger has been assigned to the Community Banks operating segment.