Borrowing Arrangements (Details) (USD $)							3 Months Ended			3 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Interest rate swap Designated as Cash Flow Hedging Instrument	Nov. 30, 2010 Interest rate swap Designated as Cash Flow Hedging Instrument	Mar. 31, 2013 Federal Home Loan Bank of Dallas	Mar. 31, 2013 Federal Reserve Discount Window	Mar. 31, 2013 Revolving Line of Credit Maturing March 2013	Dec. 31, 2012 Revolving Line of Credit Maturing March 2013	Mar. 31, 2012 Revolving Line of Credit Maturing March 2013 payments	Mar. 31, 2013 Junior Subordinated Debt Maturing March 2036	Dec. 31, 2012 Junior Subordinated Debt Maturing March 2036	Mar. 31, 2013 Junior Subordinated Debt Maturing March 2036 Maximum payment	Feb. 28, 2006 Fixed/Floating Junior Subordinated Deferrable Interest Debentures Maturing March 2036 First M&F Statutory Trust I	Mar. 31, 2013 Fixed/Floating Junior Subordinated Deferrable Interest Debentures Maturing March 2036 First M&F Statutory Trust I
Debt Instrument [Line Items]
Company’s line of credit in the amount of $5,000,000, maturing in March 2013; secured by approximately 51% of the Bank’s common stock; interest payable quarterly at the prime rate with a floor of 3.50%							$ 2,792,000	$ 2,792,000
Bank’s advances from Federal Home Loan Banks	32,085,000	33,215,000
Other borrowings	34,877,000	36,007,000
Company’s junior subordinated debentures, interest payable quarterly at 90-day LIBOR plus 1.33% through March 2036; currently redeemable	30,928,000	30,928,000								30,928,000	30,928,000
Line of credit maximum borrowing capacity							5,000,000
Line of Credit Facility, Frequency of Payments							quarterly
Percent of common stock securing line of credit							51.00%
Line of credit interest rate floor							3.50%
Floating interest rate over LIBOR			1.33%							1.33%
Debt Instrument, Frequency of Periodic Payment										quarterly				quarterly
Number of Required Principal Payments									3
Required payment for Q2 March 2012								125,000
Required payment for Q3 March 2012										125,000
Required payment for Q4 March 2012										125,000
Available amount of line of credit					40,318,000	9,513,000
Fixed/floating rate junior subordinated deferrable interest debentures													30,928,000
Cash received													30,000,000
Common securities received in transaction													928,000
Number of consecutive quarterly payments of interest that may be deferred												20
Interest rate swap, notional value				$ 30,000,000
Interest rate swap, stated rate (as a percentage)			3.795%