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Related Party Transactions (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) joint_venture | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Related Party Transaction [Line Items] |  |  |
Payable to affiliates | $ 2.1 |  | $ 3.0
Two microwave communication network JVs |  |  |
Related Party Transaction [Line Items] |  |  |
Payments to related party | $ 5.2 | $ 5.6 |
Number of microwave communication network JVs the Company makes payments to | joint_venture | 2 |  |
Level 3 |  |  |
Related Party Transaction [Line Items] |  |  |
Payments for purchases | $ 0.3 | 0.7 |
Dell |  |  |
Related Party Transaction [Line Items] |  |  |
Payments for purchases | 1.1 | 0.6 |
SBI |  |  |
Related Party Transaction [Line Items] |  |  |
Payments to related party | $ 3.4 | $ 2.3 |

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