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Labor Union Contracts	6 Months Ended
Labor Union Contracts	Jun. 30, 2021
Risks and Uncertainties [Abstract]
Labor Union Contracts	Labor Union Contracts As of June 30, 2021, approximately 44% of our employees were represented by the Communication Workers of America ("CWA") or the International Brotherhood of Electrical Workers ("IBEW"). There are no collective bargaining agreements that are scheduled to expire over the 12 month period ending June 30, 2022. We believe relations with our employees continue to be generally good.