Acquisition Activity (Schedule Of Adjustments Had On The Goodwill Recorded On The Acquisition) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	May 31, 2011
Omni Bancshares, Inc. [Member]
Goodwill [Line Items]
Goodwill, as originally reported	$ 63,518,000
Valuation - loans acquired	25,749,000
Valuation - OREO acquired	5,663,000
Valuation - deferred tax asset	(32,009,000)
Other asset valuations	1,053,000
Total adjustments to goodwill	456,000
Goodwill, as adjusted	63,974,000	63,974,000
Cameron Bancshares, Inc. [Member]
Goodwill [Line Items]
Goodwill, as originally reported	51,315,000
Valuation - loans acquired	29,144,000
Valuation - OREO acquired	315,000
Valuation - deferred tax asset	(9,208,000)
Other asset valuations	(9,000)
Total adjustments to goodwill	20,242,000
Goodwill, as adjusted	$ 71,557,000