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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
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Net Income Available to Common Shareholders | $ 42,950 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 33,150 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 48,098 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net Income from Continuing Operations | 43,529 us-gaap_IncomeLossFromContinuingOperations | 33,729 us-gaap_IncomeLossFromContinuingOperations | 44,087 us-gaap_IncomeLossFromContinuingOperations
Basic | $ 3.14 us-gaap_EarningsPerShareBasic | $ 2.43 us-gaap_EarningsPerShareBasic | $ 3.55 us-gaap_EarningsPerShareBasic
Diluted | $ 3.10 us-gaap_EarningsPerShareDiluted | $ 2.42 us-gaap_EarningsPerShareDiluted | $ 3.54 us-gaap_EarningsPerShareDiluted
Basic | $ 3.14 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 2.43 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 3.21 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Diluted | $ 3.10 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 2.42 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 3.20 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Earnings Per Share Basic and Diluted |  |  |
Net Income Available to Common Shareholders | 42,950 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 33,150 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 48,098 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Net Income from Continuing Operations | 43,529 us-gaap_IncomeLossFromContinuingOperations / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 33,729 us-gaap_IncomeLossFromContinuingOperations / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 44,087 us-gaap_IncomeLossFromContinuingOperations / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Net income from continuing operations available to common shareholders | $ 42,950 fil_NetIncomeFromContinuingOperationsAvailableToCommonShareholders / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 33,150 fil_NetIncomeFromContinuingOperationsAvailableToCommonShareholders / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 43,479 fil_NetIncomeFromContinuingOperationsAvailableToCommonShareholders / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Weighted Average Number of Shares Outstanding, Basic | 13,700 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 13,635 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 13,534 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Average common share stock options and warrants outstanding | 176 fil_AverageCommonShareStockOptionsAndWarrantsOutstanding / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 80 fil_AverageCommonShareStockOptionsAndWarrantsOutstanding / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 58 fil_AverageCommonShareStockOptionsAndWarrantsOutstanding / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Weighted Average Number of Shares Outstanding, Diluted | 13,876 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 13,715 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | 13,592 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Basic | $ 3.14 us-gaap_EarningsPerShareBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 2.43 us-gaap_EarningsPerShareBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 3.55 us-gaap_EarningsPerShareBasic / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Diluted | $ 3.10 us-gaap_EarningsPerShareDiluted / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 2.42 us-gaap_EarningsPerShareDiluted / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 3.54 us-gaap_EarningsPerShareDiluted / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Basic | $ 3.14 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 2.43 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 3.21 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Diluted | $ 3.10 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 2.42 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember | $ 3.20 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share |  |  | $ 0.34 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicAndDilutedMember
Earnings per share, basic |  |  |
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share |  |  | $ 0.34 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare / fil_EarningsPerShareAxis = fil_EarningsPerShareBasicMember1Member

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