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Debt - Australian Dollar Term Loan (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020 AUD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 AUD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 AUD ($)
Debt Instrument [Line Items]
Debt (inclusive of discount)		$ 8,797,424		$ 8,751,544
Australian Dollar Term Loan
Debt Instrument [Line Items]
Debt (inclusive of discount)		$ 243,152	$ 350,000	226,924
Par		99.00%	99.00%
Amount of quarterly installments based on the original principal	$ 8,750
Australian Dollar Term Loan | BBSY
Debt Instrument [Line Items]
Debt (inclusive of discount)		$ 244,014	$ 316,563	$ 228,156	$ 325,313
Debt instrument, basis spread on variable rate	3.875%
Effective interest rate (as a percent)		3.90%	3.90%	4.80%	4.80%

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- Definition

Debt Instrument, Par, Percentage

+ References

No definition available.

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- Definition

Represents the amount of payments due as a percentage of the original principal amount.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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