Debt Instrument, Covenant, Fixed Charge Coverage Ratio, Minimum

No definition available.

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- Definition

Amount of letters of credit issued under credit facility.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
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-Topic 230
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-Section 45
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-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
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-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Details

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Period Type:

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Debt - Short-Term Debt and Available Facilities (Details)	1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	May 01, 2020	Dec. 31, 2019 USD ($)	Sep. 22, 2017 USD ($)
Line of Credit Facility [Abstract]
Short-term debt			$ 13,000,000		$ 13,000,000			$ 0
Loss on extinguishment of debt			$ 0	$ 0	$ 0	$ 2,000,000
6.5% Senior Secured Notes due 2025 \| Senior Notes
Line of Credit Facility [Abstract]
Interest rate			6.50%		6.50%		6.50%
Revolving Credit Facility
Line of Credit Facility [Abstract]
Proceeds from line of credit	$ 200,000,000
Wells Fargo Revolver
Line of Credit Facility [Abstract]
Letters of credit issued and undrawn			$ 30,000,000		$ 30,000,000
Wells Fargo Revolver \| Revolving Credit Facility
Line of Credit Facility [Abstract]
Short-term debt			0		0			0
Maximum borrowing capacity		$ 350,000,000							$ 550,000,000
Loss on extinguishment of debt				0		2,000,000
Covenant, fixed charge coverage ratio, minimum		1.0
Standard Bank Revolver \| Revolving Credit Facility
Line of Credit Facility [Abstract]
Short-term debt			0		0			0
Emirates Revolver \| Revolving Credit Facility
Line of Credit Facility [Abstract]
Short-term debt			0		0			0
SABB Credit Facility
Line of Credit Facility [Abstract]
Short-term debt			13,000,000		$ 13,000,000			$ 0
Proceeds from line of credit			$ 13,000,000
ABSA Revolver
Line of Credit Facility [Abstract]
Loss on extinguishment of debt				$ 0
ABSA Revolver \| Maximum
Line of Credit Facility [Abstract]
Loss on extinguishment of debt						$ 1,000,000