Mergers and Acquisition (Details) (USD $)	9 Months Ended			0 Months Ended		0 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Sep. 01, 2013 First M&F Merger [Member]	Sep. 01, 2013 First M&F Merger [Member] First M&F [Member] Branches	Sep. 01, 2013 First M&F Merger [Member] Common Stock [Member]	Sep. 01, 2013 Core Deposits [Member] First M&F Merger [Member]	Sep. 01, 2013 Junior Subordinated Debt [Member] First M&F Merger [Member]	Sep. 01, 2013 London Interbank Offered Rate (LIBOR) [Member] Junior Subordinated Debt [Member] First M&F Merger [Member]
Business Acquisition [Line Items]
Number of Banking and Insurance Locations the Entity Operates					43
Shares issued to common shareholders (shares)				6,175,586		6,175,586
Voting interest acquired (percent)					100.00%
Total Purchase Price				$ 156,779,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Including Goodwill				115,600,000
Goodwill resulting from merger	275,328,000	184,859,000	184,859,000	90,548,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill							25,033,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							10 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt				25,346,000				30,900,000
Debt Instrument, Description of Variable Rate Basis	the three-month LIBOR plus a pre-determined spread							90-day LIBOR
Debt Instrument, Basis Spread on Variable Rate									1.33%
Liabilities, Fair Value Adjustment								$ 12,371,000