Mergers and Acquisition (Details) (USD $)	2 Months Ended				0 Months Ended				0 Months Ended
	Apr. 30, 2012	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Sep. 01, 2013 First M&F Merger	Sep. 01, 2013 First M&F Merger		Sep. 01, 2013 First M&F Merger First M&F Branches	Sep. 01, 2013 First M&F Merger Common Stock	Sep. 01, 2013 Core Deposits First M&F Merger	Sep. 01, 2013 Junior Subordinated Debt First M&F Merger	Sep. 01, 2013 LIBOR Junior Subordinated Debt First M&F Merger
Business Acquisition [Line Items]
Number of banking and insurance locations the entity operates (branches)								43
Shares issued to common shareholders (shares)					6,175,576				6,175,576
Voting interest acquired (percent)								100.00%
Total Purchase Price					$ 156,845,000
Intangible assets, including goodwill						115,200,000
Goodwill resulting from merger		274,658,000	276,100,000	275,328,000		90,127,000	[1]
Intangible assets, other than goodwill										25,032,000
Weighted average useful life										10 years
Borrowings						25,346,000					30,900,000
Variable interest rate of derivatives, description	the three-month LIBOR plus a pre-determined spread										90-day LIBOR
Basis spread on variable rate (percent)												1.33%
Fair value adjustment											$ 12,371,000

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