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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2011
--- | --- | --- | ---
Securities, market value | $ 575,404 | $ 615,458 | $ 580,630
Common stock, par value | $ 1.00 | $ 1.00 | $ 1.00
Common stock, shares authorized | 20,000,000 | 20,000,000 | 20,000,000
Common stock, shares issued | 15,153,991 | 15,117,430 | 15,273,181
Common stock, shares outstanding | 15,153,991 | 15,117,430 | 15,273,181
Accumulated other comprehensive income, tax | $ 3,746 | $ 5,084 | $ 5,217
Senior preferred stock |  |  |
Preferred stock, par value | $ 1.00 | $ 1.00 | $ 1.00
Preferred stock, shares authorized | 10,000,000 | 10,000,000 | 10,000,000
Preferred stock, shares issued | 0 | 0 | 0
Cumulative preferred stock |  |  |
Preferred stock, par value | $ 5.00 | $ 5.00 | $ 5.00
Preferred stock, shares authorized | 900,000 | 900,000 | 900,000
Preferred stock, shares issued | 0 | 0 | 0

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