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Common Stock and Earnings per Share (Details)
12 Months Ended
Dec. 31, 2012
Shares outstanding at January 1 10,357,930
10% stock dividend issued December 14, 2012 1,040,984
Issued under stock-based compensation plan 28,370
Stock options/SARs exercised 36,547
Shares outstanding at December 31 11,463,831