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Income Taxes Income Tax Narrative Details (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]    
Summary of Income Tax Contingencies
A reconciliation of the beginning and ending amount of gross uncertain tax positions, excluding penalties and interest, is as follows: 
 Year Ended December 31,
(in thousands)202120202019
Balance at beginning of year$20,086 $16,911 $14,971 
Additions based on tax positions related to the current year1,934 2,229 3,662 
Reductions for expiration of statutes of limitations(784)(628)(2,835)
Additions based on tax positions related to prior years2,011 1,830 2,060 
Reductions based on tax positions related to prior years(2,818)(68)(563)
Settlements(3,062)(188)(384)
Balance at end of year$17,367 $20,086 $16,911 
  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
The reconciliation between the actual income tax provision and income tax computed using the U.S. statutory federal income tax rate is summarized as follows:
Year Ended December 31,
(in thousands)202120202019
Income tax provision (benefit) at the U.S. statutory rate$(1,199)$(104,769)$(69,472)
Tax Act - net mandatory repatriation tax— — (8,220)
CARES Act — (4,681)— 
Permanent differences for goodwill impairments— 50,435 — 
Valuation allowances33,068 46,650 74,553 
Foreign tax rate differential8,619 6,088 18,439 
Stock compensation542 1,032 989 
Uncertain tax positions158 (5,939)3,046 
Other items, net2,410 9,038 (1,712)
Total provision (benefit) for income taxes$43,598 $(2,146)$17,623 
  
Schedule of Components of Income Tax Expense (Benefit) provision (benefit) applicable for domestic and foreign taxes and cash taxes paid are as follows: 
 Year Ended December 31,
(in thousands)202120202019
Current income tax expense (benefit):
Domestic$974 $(32,743)$(7,571)
Foreign44,422 34,755 37,462 
Total current income tax expense (benefit)45,396 2,012 29,891 
Deferred income tax expense (benefit):
Domestic(328)(9,192)(10,860)
Foreign(1,470)5,034 (1,408)
Total deferred income tax expense (benefit)(1,798)(4,158)(12,268)
Total income tax expense (benefit)$43,598 $(2,146)$17,623 
Cash taxes paid, net$29,204 $26,264 $29,806 
The components of the income tax provision (benefit) applicable for domestic and foreign taxes and cash taxes paid are as follows: 
 Year Ended December 31,
(in thousands)202120202019
Current income tax expense (benefit):
Domestic$974 $(32,743)$(7,571)
Foreign44,422 34,755 37,462 
Total current income tax expense (benefit)45,396 2,012 29,891 
Deferred income tax expense (benefit):
Domestic(328)(9,192)(10,860)
Foreign(1,470)5,034 (1,408)
Total deferred income tax expense (benefit)(1,798)(4,158)(12,268)
Total income tax expense (benefit)$43,598 $(2,146)$17,623 
Cash taxes paid, net$29,204 $26,264 $29,806 
Schedule of Income before Income Tax, Domestic and Foreign
The components of income (loss) before income taxes are as follows: 
 Year Ended December 31,
(in thousands)202120202019
Domestic$(125,010)$(306,354)$(271,515)
Foreign119,301 (192,543)(59,306)
Income (loss) before income taxes
$(5,709)$(498,897)$(330,821)
  
Schedule of Deferred Tax Assets and Liabilities  
Significant components of net deferred tax assets and liabilities were as follows: 
 December 31,
(in thousands)20212020
Deferred tax assets:
Deferred compensation$17,169 $16,761 
Deferred income7,604 1,958 
Accrued expenses23,555 27,864 
Net operating loss and other carryforwards551,724 521,757 
Long-term operating lease liabilities34,728 40,417 
Goodwill and intangibles19,623 19,357 
Interest31,898 27,359 
Other27,667 14,045 
Gross deferred tax assets713,968 669,518 
Valuation allowances(679,242)(592,516)
Total deferred tax assets$34,726 $77,002 
Deferred tax liabilities:
Property and equipment$7,185 $1,343 
Basis difference in equity investments1,948 2,348 
Right-of-use operating lease assets26,968 28,519 
Interest— 47,785 
Total deferred tax liabilities$36,101 $79,995 
Net deferred income tax liability$1,375 $2,993 
Our net deferred tax liability is reflected within our balance sheet as follows: 
 December 31,
(in thousands)20212020
Deferred tax liabilities included in other long-term liabilities$1,375 $2,993 
Net deferred income tax liability$1,375 $2,993 
Summary of Valuation Allowance [Table Text Block]
The following is a reconciliation of the beginning and ending amounts of our valuation allowances:
Year Ended December 31,
(in thousands)202120202019
Balance at beginning of year$(592,516)$(277,258)$(203,040)
Increase due principally to net operating losses(83,908)(300,748)(59,596)
(Increase) decrease due to foreign tax and business credit carryforwards(5,761)(14,510)(14,622)
Reduction due to utilization of foreign tax credits generated in prior years2,943 — — 
Balance at end of year$(679,242)$(592,516)$(277,258)
  
Summary of Income Tax Examinations  
Our tax returns are subject to audit by taxing authorities in multiple jurisdictions. These audits often take years to complete and settle. The following table lists the earliest tax years open to examination by tax authorities where we have significant operations: 
JurisdictionPeriods
United States2014
United Kingdom2019
Norway2016
Angola2013
Brazil2017
Australia2017
Tax Credit Carryforward [Line Items]    
Liability for Uncertainty in Income Taxes, Noncurrent $ 14,830 $ 15,010