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Summary of Significant Accounting Policies - Revenue Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | $ 1,062,224 | $ 1,060,991 | $ 3,182,994 | $ 3,164,272
Global Data Center Business |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | 64,418 | 63,380 | 188,245 | 164,878
Storage rental |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | 673,318 | 656,973 | 2,005,580 | 1,963,561
Storage rental | Global Data Center Business |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | 62,001 | $ 60,039 | 182,301 | $ 157,479
Operating Segments | Storage Rental, Power and Connectivity | Global Data Center Business |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | $ 12,000 |  | $ 31,000 |

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