Acquisition Activity (Details) (Florida Gulf Bancorp, Inc. [Member], USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Florida Gulf Bancorp, Inc. [Member]
Business Acquisition [Line Items]
Date of acquisition agreement	March 19, 2012
Number of branches of acquiree	8
Total assets	$ 376
Total loans	257
Total deposits	303
Common stock outstanding per share	23.00
Contingent consideration for acquisition	4.4
Redeemed preferred stock during acquisition	$ 4.1