Mergers and Acquisition (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Sep. 01, 2013 First M&F Merger		Sep. 01, 2013 First M&F Merger First M&F Branches	Sep. 01, 2013 Core Deposits First M&F Merger	Sep. 01, 2013 Junior Subordinated Debt First M&F Merger	Sep. 01, 2013 London Interbank Offered Rate (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				$ 156,834
Intangible assets				116,366
Goodwill resulting from merger	276,144	276,100	184,779	91,333	[1]
Intangible assets, excluding goodwill							25,033
Weighted average useful life							10 years
Borrowings				25,346				30,900
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%
Liabilities, fair value adjustment								$ 12,371

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