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Income Taxes Deferred income tax assets (liabilities) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Deferred tax assets and liabilities [Line Items] |  |
Deferred Tax Assets, Operating Loss Carryforwards | $ 0 | $ 12,686
Non-current deferred tax asset | 67,961 | 76,571
Deferred Tax Assets, Net | 25,907 | 37,933
Non-current deferred tax asset, gross total [Member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other | 2,632 | 11,109
Deferred Tax Assets, Other | 0 | 12,451
Noncurrent deferred tax asset - acquired future tax deductions | 8,711 | 10,722
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | 9,654 | 10,775
Deferred Tax Assets, Unrealized Currency Losses | 2,716 | 3,108
Noncurrent deferred tax asset - tax credits state | 11,331 | 14,470
Deferred Tax Assets, Inventory | 4,305 | 5,674
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts | 4,242 | 830
Noncurrentdeferredtaxassetaccruedrestructuring | 7,072 | 182
Noncurrentdeferredtaxassetchargebacksdiscountscustomerconcessions | 20,975 | 0
Deferred Tax Assets, Valuation Allowance, Noncurrent | (3,677) | (5,436)
Noncurrent deferred tax liability [Member] |  |
Deferred tax assets and liabilities [Line Items] |  |
Noncurrent deferred tax liability - depreciation and amortization | 23,839 | 35,387
Noncurrent deferred tax liability - state income taxes | 2,600 | 2,639
Noncurrent deferred tax liability - foreign | 997 | 612
Deferred Tax Liabilities, Net | 42,054 | 38,638
Deferred tax liability, change in accounting method | $ 14,618 | $ 0

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