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Note 7 - Segment Reporting - Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Total adjusted EBITDA $ 214,194 $ 86,025
Interest expense (7,723) (9,053)
Depreciation and amortization (18,237) (16,116)
Non-cash write-down and other adjustments (1) [1] 3,868 (2,284)
Non-cash share-based compensation expense (2) [2] (5,448) (4,574)
Transaction costs and credit facility fees (3) [3] (914) (234)
Business optimization and other charges (4) [4] (159) (512)
Other (268) (397)
Income before provision for income taxes 185,313 52,855
Domestic [Member]    
Total adjusted EBITDA 207,073 82,775
International [Member]    
Total adjusted EBITDA $ 7,121 $ 3,250
[1] Includes gains/losses on disposals of assets and investments, unrealized mark-to-market adjustments on commodity contracts, and certain foreign currency related adjustments.
[2] Represents share-based compensation expense to account for stock options, restricted stock and other stock awards over their respective vesting periods.
[3] Represents transaction costs incurred directly in connection with any investment, as defined in our credit agreement, equity issuance, debt issuance or refinancing, together with certain fees relating to our senior secured credit facilities.
[4] Represents severance and other non-recurring restructuring charges related to the consolidation of certain of our facilities.