Note 11 - Share-based Awards and Cash-based Awards - Summary of Compensation Expense Related to Share-Based Awards and Cash-Based Awards (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Share-based compensation expense | $ 3,690 | $ 3,540 | $ 8,065 |
| Total charged to operating income | 14,793 | 16,722 | 15,198 |
| General and Administrative Expense [Member] | |||
| Share-based compensation expense | 3,690 | 3,540 | 8,065 |
| Cash-based incentive compensation | 8,897 | 9,586 | 5,032 |
| Lease Operating Expense [Member] | |||
| Cash-based incentive compensation | $ 2,206 | $ 3,596 | $ 2,101 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Cash-based incentive compensation charged to operating income (loss). No definition available.
|
| X | ||||||||||
- Definition The total amount of share-based and cash-based incentive compensation charged to operating income. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|