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Other Real Estate and Covered Other Real Estate (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 Construction Land Development And Other Land Properties [Member] | Dec. 31, 2011 Construction Land Development And Other Land Properties [Member] | Sep. 30, 2012 1-4 Family Residential Properties [Member] | Dec. 31, 2011 1-4 Family Residential Properties [Member] | Sep. 30, 2012 Nonfarm, Nonresidential Properties [Member] | Dec. 31, 2011 Nonfarm, Nonresidential Properties [Member] | Sep. 30, 2012 Other Real Estate Properties [Member] | Dec. 31, 2011 Other Real Estate Properties [Member] | Apr. 15, 2011 Heritage Banking Group Business Acquisition [Member] | Sep. 30, 2012 Florida [Member] | Dec. 31, 2011 Florida [Member] | Sep. 30, 2012 Mississippi [Member] | Dec. 31, 2011 Mississippi [Member] | Sep. 30, 2012 Tennessee [Member] | Dec. 31, 2011 Tennessee [Member] | Sep. 30, 2012 Texas [Member] | Dec. 31, 2011 Texas [Member] | Sep. 30, 2012 Construction, Land Development And Other Land Properties [Member] | Dec. 31, 2011 Construction, Land Development And Other Land Properties [Member] | Sep. 30, 2012 1 - 4 Family Residential Properties [Member] | Dec. 31, 2011 1 - 4 Family Residential Properties [Member] | Sep. 30, 2012 Nonfarm, Nonresidential Properties [Member] | Dec. 31, 2011 Nonfarm, Nonresidential Properties [Member] | Sep. 30, 2012 Other Real Estate Properties [Member] | Dec. 31, 2011 Other Real Estate Properties [Member]
Other real estate, excluding covered other real estate [Rollforward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ 79,053 | $ 86,704 |  |  |  |  |  |  |  |  |  | $ 22,340 | $ 29,963 | $ 27,113 | [1] | $ 19,483 | [1] | $ 18,545 | [2] | $ 16,879 | [2] | $ 14,477 | $ 12,728 | $ 52,356 | $ 53,834 | $ 8,251 | $ 10,557 | $ 21,530 | $ 13,883 | $ 338 | $ 779
Additions | 32,428 | 48,975 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposals | (24,248) | (35,234) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Writedowns | (4,758) | (10,848) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period | 82,475 | 89,597 |  |  |  |  |  |  |  |  |  | 22,340 | 29,963 | 27,113 | [1] | 19,483 | [1] | 18,545 | [2] | 16,879 | [2] | 14,477 | 12,728 | 52,356 | 53,834 | 8,251 | 10,557 | 21,530 | 13,883 | 338 | 779
Gain (Loss), net on the sale of other real estate included in ORE/Foreclosure Expenses | (175) | 474 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other real estate, excluding covered other real estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | 82,475 | 89,597 |  |  |  |  |  |  |  |  |  | 22,340 | 29,963 | 27,113 | [1] | 19,483 | [1] | 18,545 | [2] | 16,879 | [2] | 14,477 | 12,728 | 52,356 | 53,834 | 8,251 | 10,557 | 21,530 | 13,883 | 338 | 779
Other real estate, excluding covered other real estate by geographic location [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total other real estate, excluding covered other real estate | 82,475 | 89,597 |  |  |  |  |  |  |  |  |  | 22,340 | 29,963 | 27,113 | [1] | 19,483 | [1] | 18,545 | [2] | 16,879 | [2] | 14,477 | 12,728 | 52,356 | 53,834 | 8,251 | 10,557 | 21,530 | 13,883 | 338 | 779
Covered other real estate, beginning of period | 6,331 |  | 1,284 | 1,304 | 1,293 | 889 | 3,145 | 4,022 | 0 | 116 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfers from covered loans | 1,424 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FASB ASC 310-30 adjustment for the residual recorded investment | (112) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net transfers from covered loans | 1,312 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposals | (1,673) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Writedowns | (248) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Covered other real estate, end of period | 5,722 |  | 1,284 | 1,304 | 1,293 | 889 | 3,145 | 4,022 | 0 | 116 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on the sale of covered other real estate included in ORE/Foreclosure expenses | 440 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, covered other real estate acquired |  |  |  |  |  |  |  |  |  |  | 7,485 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Covered Loans And Other Real Estate Acquired [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total covered other real estate | $ 5,722 |  | $ 1,284 | $ 1,304 | $ 1,293 | $ 889 | $ 3,145 | $ 4,022 | $ 0 | $ 116 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Mississippi includes Central and Southern Mississippi Regions
[2] | Tennessee includes Memphis, Tennessee and Northern Mississippi Regions

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- Definition The net gain (loss) resulting from sales and other disposals of other real estate acquired subject to loss-share agreements with the FDIC. + References No definition available. + Details
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