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Summary of Significant Accounting Policies:Labor Concentration and Unions (Details) | 12 Months Ended
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Dec. 31, 2017 employee Integer6
Concentration Risk [Line Items] |
Entity Number of Employees | 6,320
Number of collective bargaining arrangements | Integer6 | 9
Workforce Subject to Collective Bargaining Arrangements [Member] | Unionized Employees Concentration Risk [Member] |
Concentration Risk [Line Items] |
Concentration Risk, Percentage | 24.00%
Workforce in Canada subject to Collective Bargaining Agreements [Member] | Unionized Employees Concentration Risk [Member] |
Concentration Risk [Line Items] |
Entity Number of Employees | 93

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