Mergers and Acquisitions-Pro Forma (Details) (First M&F Merger, USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
First M&F Merger
Business Acquisition [Line Items]
Interest income	$ 54,854
Interest expense	7,706
Net interest income	47,148
Provision for loan losses	4,330
Noninterest income	23,080
Noninterest expense	51,646
Income before income taxes	14,252
Income taxes	3,817
Net income	$ 10,435
Earnings per share:
Basic (usd per share)	$ 0.33
Diluted (usd per share)	$ 0.33