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Derivative Instruments - Derivatives Not Designated as Hedging Instruments (Details) $ in Thousands |  |  | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 02, 2019 USD ($) | Jan. 16, 2018 EUR (€) | Mar. 31, 2019 USD ($) | Apr. 30, 2019 USD ($) swap $ / € | Apr. 30, 2019 EUR (€) swap $ / € | Dec. 31, 2018 USD ($) swap $ / € | Dec. 31, 2018 EUR (€) swap $ / € | Apr. 23, 2018 USD ($) | Dec. 31, 2017 EUR (€) swap | Dec. 31, 2010 USD ($) swap
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Fair value of derivative assets |  |  | $ 6,197 |  |  | $ 3,259 |  |  |  |
Derivatives not designated as hedging instruments: | Contingent redemption features - Series A Preferred Stock |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Fair value of derivative assets |  |  |  |  |  |  |  | $ 140,300 |  |
Probability of conversion |  |  |  |  |  |  |  | 100.00% |  |
Derivatives not designated as hedging instruments: | Foreign Exchange Forward |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, notional amount | € |  |  |  |  |  |  |  |  | € 200,000,000 |
Number of currency derivatives held (derivative instrument) | swap |  |  |  |  |  | 2 | 2 |  | 6 |
Unrealized gain (loss) on derivatives | € |  | € (9,960,000) |  |  |  |  |  |  |  |
Derivatives not designated as hedging instruments: | Cross currency swaps |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative liability, noncurrent |  |  | 0 |  |  | $ 6,656 |  |  |  |
Current derivative liability |  |  | 1,223 |  |  | 4,021 |  |  |  |
Current derivative asset |  |  | 3,777 |  |  | 0 |  |  |  |
Derivatives not designated as hedging instruments: | Cross currency swaps | Europe |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, notional amount | € |  |  |  |  |  |  | € 275,000,000 |  |  |
Derivatives not designated as hedging instruments: | Cross currency swaps | Chile |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  |  |  | $ 31,000
Derivative liability, noncurrent |  |  |  |  |  | 6,656 |  |  |  |
Derivative, number of instruments held (derivative instrument) | swap |  |  |  |  |  |  |  |  |  | 4
Payment on settlement of derivative |  |  | $ 8,200 |  |  |  |  |  |  |
Derivatives not designated as hedging instruments: | Cross Currency Interest Rate Contract, Maturing April 8, 2019 | Europe |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  | $ 310,750 | € 275,000,000 |  |  |
Derivative, exchange rate | $ / € |  |  |  |  |  | 1.13 | 1.13 |  |  |
Derivatives not designated as hedging instruments: | Cross Currency Interest Rate Contract, Maturing December 1, 2024 | Chile |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, number of instruments held (derivative instrument) | swap |  |  |  |  |  |  |  |  |  | 1
Derivatives not designated as hedging instruments: | Cross Currency Interest Rate Contract, Maturing July 1, 2025 | Chile |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, number of instruments held (derivative instrument) | swap |  |  |  |  |  |  |  |  |  | 3
Minimum | Derivatives not designated as hedging instruments: | Cross currency swaps | Europe |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, exchange rate | $ / € |  |  |  |  |  | 1.13355 | 1.13355 |  |  |
Maximum | Derivatives not designated as hedging instruments: | Cross currency swaps | Europe |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, exchange rate | $ / € |  |  |  |  |  | 1.1439 | 1.1439 |  |  |
Subsequent Event | Derivatives not designated as hedging instruments: | Foreign Exchange Forward |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Number of currency derivatives held (derivative instrument) | swap |  |  |  | 7 | 7 |  |  |  |  |
Subsequent Event | Derivatives not designated as hedging instruments: | Cross currency swaps | Europe |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  | $ 423,003 | € 375,000,000 |  |  |  |  |
Subsequent Event | Derivatives not designated as hedging instruments: | Cross Currency Interest Rate Contract, Maturing April 8, 2019 | Europe |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |
Payment on settlement of derivative | $ 980 |  |  |  |  |  |  |  |  |
Derivative, exchange rate | $ / € |  |  |  | 1.128007 | 1.128007 |  |  |  |  |

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