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Note 18 - Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
|  | (Dollars in thousands) |
U.S. |  | $ | 13,680 |  |  | $ | (7,109 | ) |  | $ | (236 | )
Non-U.S. (foreign) |  |  | 157,050 |  |  |  | 148,197 |  |  |  | 113,835 |
Total income from continuing operations, before income taxes and equity in losses of investees |  | $ | 170,730 |  |  | $ | 141,088 |  |  | $ | 113,599 |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
|  | (Dollars in thousands) |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 43,935 |  |  | $ | — |  |  | $ | 51 |
State |  |  | 43 |  |  |  | (276 | ) |  |  | 252 |
Foreign |  |  | 11,186 |  |  |  | 13,554 |  |  |  | 18,808 |
Total current income tax expense |  | $ | 55,164 |  |  | $ | 13,278 |  |  | $ | 19,111 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (55,718 | ) |  |  | 57 |  |  |  | 168 |
State |  |  | (3,284 | ) |  |  | — |  |  |  | — |
Foreign |  |  | 25,502 |  |  |  | 23,724 |  |  |  | (35,336 | )
Total deferred tax provision (benefit) |  |  | (33,500 | ) |  |  | 23,781 |  |  |  | (35,168 | )
Total provision (benefit) for income taxes |  | $ | 21,664 |  |  | $ | 37,059 |  |  | $ | (16,057 | )
Components Of Deferred Income Tax Expense (Benefit) [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
|  | (Dollars in thousands) |
Other deferred tax expense (exclusive of the effect of other components listed below) |  | $ | 4,337 |  |  | $ | (1,822 | ) |  | $ | 2,034 |
Usage (benefit) of operating loss carryforwards - U.S. |  |  | 72,293 |  |  |  | (28,065 | ) |  |  | (5,576 | )
Change in valuation allowance |  |  | (38,548 | ) |  |  | 23,336 |  |  |  | (40,999 | )
Change in foreign valuation allowance |  |  | — |  |  |  | — |  |  |  | (49,701 | )
Change in foreign income tax |  |  | 25,502 |  |  |  | 23,724 |  |  |  | 14,365 |
Change in lease transaction |  |  | — |  |  |  | — |  |  |  | 4,574 |
Change in tax monetization transaction |  |  | (3,091 | ) |  |  | 51,040 |  |  |  | 16,004 |
Change in depreciation |  |  | (29,265 | ) |  |  | (42,411 | ) |  |  | (205 | )
Change in foreign tax credits |  |  | (86,206 | ) |  |  | — |  |  |  | — |
Change in withholding tax |  |  | 14,400 |  |  |  | — |  |  |  | — |
Change in state and investment tax credits |  |  | (144 | ) |  |  | — |  |  |  | — |
Change in intangible drilling costs |  |  | 19,008 |  |  |  | 4,511 |  |  |  | 4,932 |
Change in production tax credits and alternative minimum tax credit |  |  | (2,086 | ) |  |  | (11,643 | ) |  |  | 610 |
Basis difference in partnership interests |  |  | (9,700 | ) |  |  | 5,111 |  |  |  | 18,794 |
|  | $ | (33,500 | ) |  | $ | 23,781 |  |  | $ | (35,168 | )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
U.S. federal statutory tax rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
Impact of federal tax reform |  |  | (12.4 | ) |  |  | - |  |  |  | - |
Transition tax inclusion |  |  | 42.1 |  |  |  | - |  |  |  | - |
Foreign tax credits |  |  | (50.5 | ) |  |  | - |  |  |  | - |
Tax basis adjustment |  |  | - |  |  |  | (4.9 | ) |  |  | 34.9 |
Withholding tax |  |  | 34.1 |  |  |  | - |  |  |  | - |
Valuation allowance - U.S. |  |  | (22.6 | ) |  |  | 16.5 |  |  |  | (36.1 | )
Valuation allowance – foreign |  |  | - |  |  |  | - |  |  |  | (43.8 | )
State income tax, net of federal benefit |  |  | 1.1 |  |  |  | (0.6 | ) |  |  | 0.6 |
Effect of foreign income tax, net |  |  | (10.7 | ) |  |  | (10.3 | ) |  |  | (5.9 | )
Production tax credits |  |  | (1.2 | ) |  |  | (8.3 | ) |  |  | (0.1 | )
Subpart F income |  |  | 1.7 |  |  |  | 0.3 |  |  |  | 1.3 |
Other, net |  |  | (3.9 | ) |  |  | (1.4 | ) |  |  | - |
Effective tax rate |  |  | 12.7 | % |  |  | 26.3 | % |  |  | (14.1% | )
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
|  | December 31, |
|  | 2017 (As restated) |  |  | 2016 |
|  | (Dollars in thousands) |
Deferred tax assets (liabilities): |  |  |  |  |  |  |  |
Net foreign deferred taxes, primarily depreciation |  | $ | (61,961 | ) |  | $ | (36,413 | )
Depreciation |  |  | (65,315 | ) |  |  | (10,253 | )
Intangible drilling costs |  |  | 13,003 |  |  |  | 24,856 |
Net capital loss carryforward - U.S. |  |  | 55,084 |  |  |  | 127,633 |
Tax monetization transaction |  |  | (13,134 | ) |  |  | (96,293 | )
State and Investment tax credits |  |  | 813 |  |  |  | 1,341 |
Production tax credits |  |  | 85,193 |  |  |  | 82,435 |
Foreign tax credits |  |  | 86,206 |  |  |  | - |
Withholding tax |  |  | (14,400 | ) |  |  | - |
Stock options amortization |  |  | 1,166 |  |  |  | 1,476 |
Basis difference in partnership interest |  |  | (16,817 | ) |  |  | (18,200 | )
Accrued liabilities and other |  |  | 3,109 |  |  |  | 3,241 |
Total deferred tax assets (liabilities) |  |  | 72,947 |  |  |  | 79,823 |
Less - valuation allowance |  |  | (77,571 | ) |  |  | (116,234 | )
Total |  | $ | (4,624 | ) |  | $ | (36,411 | )
Summary of Valuation Allowance [Table Text Block] |
|  | December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
|  | (Dollars in thousands) |
Balance at beginning of the year |  | $ | 116,234 |  |  | $ | 92,898 |  |  | $ | 183,598 |
Additions to valuation allowance |  |  | 46,560 |  |  |  | 23,336 |  |  |  | - |
Release of valuation allowance |  |  | (85,223 | ) |  |  | - |  |  |  | (90,700 | )
Balance at end of the year |  | $ | 77,571 |  |  | $ | 116,234 |  |  | $ | 92,898 |
Schedule of Deferred Taxes Classified in Balance Sheet [Table Text Block] |
|  | December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
|  | (Dollars in thousands) |
Non-current deferred tax assets |  | $ | 57,337 |  |  | $ | — |  |  | $ | — |
Non-current deferred tax liabilities |  |  | (61,961 | ) |  |  | (36,411 | ) |  |  | (28,989 | )
Total Non-current deferred tax assets, net |  |  | (4,624 | ) |  |  | (36,411 | ) |  |  | (28,989 | )
Uncertain tax benefit offset (1) |  |  | (95 | ) |  |  | — |  |  |  | — |
|  | $ | (4,719 | ) |  | $ | (36,411 | ) |  | $ | (28,989 | )
Summary of Income Tax Contingencies [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 (As restated) |  |  | 2016 |  |  | 2015 |
|  | (Dollars in thousands) |
Balance at beginning of year |  | $ | 4,609 |  |  | $ | 7,781 |  |  | $ | 4,477 |
Additions based on tax positions taken in prior years |  |  | 5 |  |  |  | 675 |  |  |  | (1 | )
Additions based on tax positions taken in the current year |  |  | 2,580 |  |  |  | 1,532 |  |  |  | 4,619 |
Reduction based on tax positions taken in prior years |  |  | (837 | ) |  |  | (5,379 | ) |  |  | (1,314 | )
Balance at end of year |  | $ | 6,357 |  |  | $ | 4,609 |  |  | $ | 7,781 |
Summary of Income Tax Examinations [Table Text Block] |
Israe l | 2015 | — | 2017
Kenya | 2012 | — | 2017
Guatemala | 2013 | — | 2017
Honduras | 2012 | — | 2017
Guadeloupe | 2015 | — | 2017
Philippines | 2010 | — | 2017
New Zealand | 2012 | — | 2017

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