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4) Stock-based Compensation: Schedule of stock inventive plan changes (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2013
Outstanding at January 1, 2013 | 2.18
Class A Common Stock |
Outstanding at January 1, 2013 | 972,253
Weighted average contractual term of optionsexercisable | 4.66 years
Class C Common Stock |
Outstanding at January 1, 2013 | 5,838,505
Class C Common Stock |
Weighted average contractual term of optionsexercisable | 2.55 years
Aggregated intrinsic value of options outstanding | 2,270,018
Aggregated intrinsic value of options exercisable | 2,270,018
Class A Common Stock |
Aggregated intrinsic value of options outstanding | 4,175,255
Aggregated intrinsic value of options exercisable | 3,820,834

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