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Summary of Significant Accounting Policies - Revenue Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | $ 1,066,907 | $ 1,060,823 | $ 2,120,770 | $ 2,103,281
Global Data Center Business |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | 62,291 | 54,895 | 123,827 | 101,498
Storage rental |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | 669,288 | 655,439 | 1,332,262 | 1,306,588
Storage rental | Global Data Center Business |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | 60,582 | $ 51,945 | 120,300 | $ 97,440
Operating Segments | Storage Rental, Power And Connectivity | Global Data Center Business |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Revenues | $ 9,900 |  | $ 19,000 |

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