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Note 1: Nature of Operations and Summary of Significant Accounting Policies: Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net income $ 48,706 $ 30,269 $ 23,865
Net Income Available to Common Shareholders 48,098 26,259 20,462
Net Income from Continuing Operations 44,087 29,657 23,300
Net income from continuing operations available to common shareholders $ 43,479 $ 25,647 $ 19,897
Weighted Average Number of Shares Outstanding, Basic 13,534 13,462 13,434
Average common share stock options and warrants outstanding 58 164 612
Weighted Average Number of Shares Outstanding, Diluted 13,592 13,626 14,046
Basic $ 3.55 $ 1.95 $ 1.52
Diluted $ 3.54 $ 1.93 $ 1.46
Basic $ 3.21 $ 1.91 $ 1.48
Diluted $ 3.20 $ 1.89 $ 1.42
Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share $ 0.34 $ 0.04 $ 0.04
Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share $ 0.34 $ 0.04 $ 0.04