12) Capital Stock: Share-based Payment Arrangement, Option, Activity (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common Class A
Common Stock, Shares, Outstanding	16,107,779	15,304,798	14,535,577
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	32,517	38,473
Dividends	$ 767,178	$ 730,560
Conversion of Stock, Shares Issued	3,286	188
Common Class C
Common Stock, Shares, Outstanding	2,500,887	2,193,643	2,089,374
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	191,443	0
Dividends	$ 119,087	$ 104,457
Conversion of Stock, Shares Issued	(3,286)	(188)

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

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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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