Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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The number of derivative instruments of a particular group held by the entity.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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Derivative Instruments - Derivatives Not Designated as Hedging Instruments (Details) $ in Thousands, $ in Thousands	Jan. 16, 2018 EUR (€)	Dec. 31, 2018 USD ($) swap $ / €	Dec. 31, 2018 EUR (€) swap $ / €	Apr. 23, 2018 USD ($)	Dec. 31, 2017 USD ($) derivative_instrument	Dec. 31, 2017 EUR (€) derivative_instrument	Dec. 20, 2013 AUD ($) loan	Dec. 31, 2010 USD ($) derivative_instrument
Derivative [Line Items]
Fair value of derivative assets		$ 3,259			$ 48,186
Lines of credit \| Term Loan Two \| Syndicated Facility Agreement
Derivative [Line Items]
Borrowing under credit facility							$ 22,500
THINK \| Lines of credit \| Term Loan \| Syndicated Facility Agreement
Derivative [Line Items]
Borrowing under credit facility		31,693					$ 45,000
Number of term loans (loan) \| loan							2
Derivatives not designated as hedging instruments: \| Contingent redemption features - Series A Preferred Stock
Derivative [Line Items]
Fair value of derivative assets		0		$ 140,300	42,140
Derivative, Embedded Derivative, Probability Of Conversion Of Convertible Security				100.00%
Derivatives not designated as hedging instruments: \| Interest rate swaps
Derivative [Line Items]
Derivative liability, current		$ 0			$ 179
Derivatives not designated as hedging instruments: \| Foreign Exchange Forward
Derivative [Line Items]
Unrealized gain on derivatives \| €	€ 9,960,000
Derivative, notional amount \| €						€ 200,000,000
Number of currency derivatives held (derivative instrument)		2	2		6	6
Derivatives not designated as hedging instruments: \| Cross Currency Interest Rate Contract, Maturing April 8, 2019 [Member] \| Europe
Derivative [Line Items]
Derivative, notional amount		$ 310,750	€ 275,000,000
Derivative, Swap Type, Variable Price \| $ / €		1.13	1.13
Derivatives not designated as hedging instruments: \| Cross currency swaps
Derivative [Line Items]
Derivative liability, noncurrent		$ 6,656			$ 7,939
Derivative liability, current		4,021			4,279
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			$ 7,939
Derivative, number of instruments held (derivative instrument) \| derivative_instrument								4
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) \| derivative_instrument								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) \| derivative_instrument								3
Minimum \| Derivatives not designated as hedging instruments: \| Cross currency swaps \| Europe
Derivative [Line Items]
Derivative, Swap Type, Variable Price \| $ / €		1.13355	1.13355
Maximum \| Derivatives not designated as hedging instruments: \| Cross currency swaps \| Europe
Derivative [Line Items]
Derivative, Swap Type, Variable Price \| $ / €		1.1439	1.1439