Supplemental Cash Flow Information - Change in Certain Working Capital Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Accounts receivable	$ (40,524)	$ (98,714)	$ (16,910)
Other current assets	22,644	(11,056)	(2,396)
Accounts payable	19,520	1,572	(35)
Accrued employee compensation and benefits	11,915	877	7,718
Accrued interest	1,162	12,726	6
Other accrued liabilities	(5,918)	4,239	(2,471)
Unearned revenue	3,397	358	2,037
Other, net	21,898	(19,532)	605
Total	$ 34,094	$ (109,530)	$ (11,446)

The increase (decrease) during the reporting period of the sum of amounts due within one year (or one business cycle) from customers for the credit sale of goods and services; and from note holders for outstanding loans.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.

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- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

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- Definition

The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes.

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- Definition

The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The increase (decrease) during the reporting period in other expenses incurred but not yet paid.

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- Definition

Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other.

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- References

No definition available.

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