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Note 11: Capital Stock: Schedule of Activity in shares of capital stock (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Class A Common Stock
Common Stock Outstanding	12,459,240us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	11,807,287us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	10,843,576us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	9,638,798us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	54,412us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	359,786us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	685,753us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Dividends	$ 595,020us-gaap_Dividends / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 562,152us-gaap_Dividends / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	$ 518,702us-gaap_Dividends / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Conversion of Stock, Shares Issued	2,521us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	41,773us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember	323us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Class C Common Stock
Common Stock Outstanding	1,394,069us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	1,330,191us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	1,097,410us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	1,013,598us-gaap_CommonStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		211,211us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	31,891us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
Dividends	$ 66,384us-gaap_Dividends / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	$ 63,342us-gaap_Dividends / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	$ 52,244us-gaap_Dividends / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
Conversion of Stock, Shares Issued	(2,521)us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	(41,773)us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember	(323)us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember

X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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- Definition

The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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Number of share options (or share units) exercised during the current period.

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