v3.19.1

Restructuring - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |
Total Restructuring Expenses | $ 13,281 | $ 906
Right-of-Use Asset Impairment and Operating Lease Charges |  |
Restructuring Cost and Reserve [Line Items] |  |
Total Restructuring Expenses | 9,522 | 719
Fixed Asset Impairment |  |
Restructuring Cost and Reserve [Line Items] |  |
Total Restructuring Expenses | 1,497 | 0
Severance |  |
Restructuring Cost and Reserve [Line Items] |  |
Total Restructuring Expenses | 1,136 | 514
Other Expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Total Restructuring Expenses | 1,126 | 0
Other Expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Total Restructuring Expenses | $ 0 | $ (327)

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