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Income Taxes: Schedule of Effective Income Tax Rate Reconciliation Table (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Tax at statutory rate | 35.00% | 35.00% | 35.00% | 35.00%
Nontaxable interest and dividends | (1.60%) | (7.10%) | (2.60%) | (7.20%)
Tax credits | (4.70%) | (7.40%) | (7.40%) | (6.60%)
State taxes | 0.20% | 1.00% | 0.30% | 1.40%
Other taxes | 0.70% | 0.60% | 0.20% | 0.60%
Tax percentage rate | 29.60% | 22.10% | 25.50% | 23.20%

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