Other Real Estate and Covered Other Real Estate, by geographical location (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	$ 92,509		$ 106,539		$ 78,189	$ 79,053
Alabama [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	21,196		25,912
Florida [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	35,324		34,480
Mississippi [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	17,397	[1]	22,766	[1]
Tennessee [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	10,292	[2]	12,892	[2]
Texas [Member]
Other real estate, excluding covered other real estate by geographic location [Line Items]
Total other real estate, excluding covered other real estate	$ 8,300		$ 10,489

[1] Mississippi includes Central and Southern Mississippi Regions.

[2] Tennessee includes Memphis, Tennessee and Northern Mississippi Regions.