Amount of additional debt issuance costs incurred.

No definition available.

Name:	nfe_AdditionalDebtIssuanceCosts
Namespace Prefix:	nfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount fees paid to third party in debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	nfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of premium received on issuance of debt during the period.

+ References

No definition available.

+ Details

Name:	nfe_PremiumReceivedOnIssuanceOfDebt
Namespace Prefix:	nfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of reduction in the principal balance of debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	nfe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	nfe_SeniorSecuredNotesAbstract
Namespace Prefix:	nfe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

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Namespace Prefix:
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Period Type:

Debt, 2025 Senior Secured Notes (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Dec. 17, 2020	Sep. 30, 2020	Sep. 30, 2021	Dec. 31, 2020	Sep. 02, 2020
Senior Secured Notes [Abstract]
Remaining unamortized deferred financing costs			$ 41,483	$ 10,439
2025 Senior Secured Notes [Member]
Senior Secured Notes [Abstract]
Debt instrument, issued	$ 250,000				$ 1,000,000
Fixed interest rate					6.75%
Frequency of payments			semi-annually
Maturity date			Sep. 15, 2025
Fees incurred					$ 17,937
Reduction in principal balance			$ 13,909
Remaining unamortized deferred financing costs			$ 9,323	$ 10,439	$ 6,501
Third party fees		$ 4,028
Proceeds from premium on issuance of secured debt	13,125
Additional financing costs incurred	$ 4,566