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Summary of Significant Accounting Policies:Labor Concentration and Unions (Details) | 12 Months Ended
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Dec. 31, 2020 employee Integer6
Concentration Risk [Line Items] |
Entity Number of Employees | employee | 5,970
Number of collective bargaining arrangements | Integer6 | 10
Number of Collective Bargaining Agreements Set to Expire Within One Year | Integer6 | 2
Workforce Subject to Collective Bargaining Arrangements [Member] | Unionized Employees Concentration Risk [Member] |
Concentration Risk [Line Items] |
Concentration Risk, Percentage | 22.00%
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year [Member] |
Concentration Risk [Line Items] |
Entity Number of Employees | employee | 740

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