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