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Note 19: Acquisitions: Acquisition of Trans-Western Pro Forma (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Total revenues | $ 226,936,674 us-gaap_Revenues | $ 215,315,020 us-gaap_Revenues | $ 234,260,169 us-gaap_Revenues
Net earnings | 7,754,648 us-gaap_NetIncomeLoss | 7,585,921 us-gaap_NetIncomeLoss | 16,712,518 us-gaap_NetIncomeLoss
Net earnings per Class A equivalent common share (1) | $ 0.62 us-gaap_EarningsPerShareBasic | $ 0.61 us-gaap_EarningsPerShareBasic | $ 1.46 us-gaap_EarningsPerShareBasic
Net earnings per Class A equivalent common share - assuming dilution(1) | $ 0.60 us-gaap_EarningsPerShareDiluted | $ 0.58 us-gaap_EarningsPerShareDiluted | $ 1.39 us-gaap_EarningsPerShareDiluted
ProForma1Member |  |  |
Total revenues | 229,268,653 us-gaap_Revenues / us-gaap_StatementScenarioAxis = fil_ProForma1Member | 220,011,370 us-gaap_Revenues / us-gaap_StatementScenarioAxis = fil_ProForma1Member | 236,854,910 us-gaap_Revenues / us-gaap_StatementScenarioAxis = fil_ProForma1Member
Net earnings | $ 7,996,405 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = fil_ProForma1Member | $ 7,963,589 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = fil_ProForma1Member | $ 16,576,647 us-gaap_NetIncomeLoss / us-gaap_StatementScenarioAxis = fil_ProForma1Member
Net earnings per Class A equivalent common share (1) | $ 0.64 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = fil_ProForma1Member | $ 0.64 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = fil_ProForma1Member | $ 1.45 us-gaap_EarningsPerShareBasic / us-gaap_StatementScenarioAxis = fil_ProForma1Member
Net earnings per Class A equivalent common share - assuming dilution(1) | $ 0.62 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = fil_ProForma1Member | $ 0.61 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = fil_ProForma1Member | $ 1.38 us-gaap_EarningsPerShareDiluted / us-gaap_StatementScenarioAxis = fil_ProForma1Member

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