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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Securities, market value | $ 615,458 | $ 744,432
Common stock, par value | $ 1 | $ 1
Common stock, shares authorized | 20,000,000 | 20,000,000
Common stock, shares issued | 15,117,430 | 15,368,717
Common stock, shares outstanding | 15,117,430 | 15,368,717
Accumulated other comprehensive income, tax | $ 5,084 | $ 4,551
Senior Preferred Stock [Member] |  |
Preferred stock, par value | $ 1 | $ 1
Preferred stock, shares authorized | 10,000,000 | 10,000,000
Preferred stock, shares issued | 0 | 0
Cumulative Preferred Stock [Member] |  |
Preferred stock, par value | $ 5 | $ 5
Preferred stock, shares authorized | 900,000 | 900,000
Preferred stock, shares issued | 0 | 0

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