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Stockholders' Equity:Stock Repurchase (Details) - Share Repurchase Program 2015 [Member] - shares | 12 Months Ended |
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Feb. 25, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  |  | 2,000,000
Treasury stock, shares acquired | 0 | 0 | 0 |
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 496,989 |  |  |

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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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