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Acquisitions - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands |  | 6 Months Ended |
--- | --- | --- | ---
Jan. 10, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |
Business Combination, Consideration Transferred, Accrued Purchase Price and Other Holdbacks |  | $ 26,089 | $ 0 |
Fair Value of Identifiable Assets Acquired: |  |  |  |
Goodwill |  | 4,466,634 |  | $ 4,070,267
FY 2018 Acquisitions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash Paid (gross of cash acquired) |  | 347,357 |  |
Business Combination, Consideration Transferred, Accrued Purchase Price and Other Holdbacks |  | 26,089 |  |
Total Consideration |  | 373,446 |  |
Fair Value of Identifiable Assets Acquired: |  |  |  |
Cash |  | 484 |  |
Accounts Receivable and Prepaid Expenses |  | 3,354 |  |
Property, Plant and Equipment |  | 195,470 |  |
Customer Relationship Intangible Assets |  | 7,254 |  |
Data Center In-Place Leases |  | 32,091 |  |
Data Center Tenant Relationships |  | 18,410 |  |
Data Center Above-Market Leases |  | 2,381 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | 273 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt |  | (19,941) |  |
Accounts Payable, Accrued Expenses and Other Liabilities |  | (2,197) |  |
Deferred Income Taxes |  | (31,761) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Data Center Below Market Leases |  | (694) |  |
Other Liabilities |  | (1,176) |  |
Total Fair Value of Identifiable Net Assets Acquired |  | 203,948 |  |
Goodwill |  | 169,498 |  |
Cash Acquired from Acquisition |  | 34,711 |  |
Payments for (Proceeds from) Previous Acquisition |  | 7,177 |  |
Series of Individually Immaterial Business Acquisitions and IODC Transaction [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash Paid (gross of cash acquired) |  | 1,694,403 |  |
Business Combination, Consideration Transferred, Accrued Purchase Price and Other Holdbacks |  | 26,089 |  |
Total Consideration |  | 1,720,492 |  |
Fair Value of Identifiable Assets Acquired: |  |  |  |
Cash |  | 34,711 |  |
Accounts Receivable and Prepaid Expenses |  | 10,424 |  |
Property, Plant and Equipment |  | 1,058,497 |  |
Customer Relationship Intangible Assets |  | 7,254 |  |
Data Center In-Place Leases |  | 136,431 |  |
Data Center Tenant Relationships |  | 95,772 |  |
Data Center Above-Market Leases |  | 18,820 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | 273 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt |  | (19,941) |  |
Accounts Payable, Accrued Expenses and Other Liabilities |  | (25,395) |  |
Deferred Income Taxes |  | (31,761) |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Data Center Below Market Leases |  | (12,115) |  |
Other Liabilities |  | (1,176) |  |
Total Fair Value of Identifiable Net Assets Acquired |  | 1,271,794 |  |
Goodwill |  | 448,698 |  |
IO Data Center LLC [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash Paid (gross of cash acquired) |  | 1,347,046 |  |
Business Combination, Consideration Transferred, Accrued Purchase Price and Other Holdbacks |  | 0 |  |
Total Consideration | $ 1,347,000 | 1,347,046 |  |
Fair Value of Identifiable Assets Acquired: |  |  |  |
Cash |  | 34,227 |  |
Accounts Receivable and Prepaid Expenses |  | 7,070 |  |
Property, Plant and Equipment |  | 863,027 |  |
Customer Relationship Intangible Assets |  | 0 |  |
Data Center In-Place Leases |  | 104,340 |  |
Data Center Tenant Relationships |  | 77,362 |  |
Data Center Above-Market Leases |  | 16,439 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt |  | 0 |  |
Accounts Payable, Accrued Expenses and Other Liabilities |  | (23,198) |  |
Deferred Income Taxes |  | 0 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Data Center Below Market Leases |  | (11,421) |  |
Other Liabilities |  | 0 |  |
Total Fair Value of Identifiable Net Assets Acquired |  | 1,067,846 |  |
Goodwill |  | $ 279,200 |  |

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