Income Taxes Net deferred tax asset (liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Other	$ 142,515	$ 144,225
Inventory valuation reserves	97,585	132,495
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	64,373	50,237
NOL carryforwards:
Federal	12,962	27,122
State	200,710	228,959
Energy credit and charitable contribution carryforward	8,648	7,692
Deferred Tax Assets, Gross	526,793	590,730
Deferred Tax Liabilities [Abstract]
Deferred income	(228,186)	(195,596)
Intangibles and other	(44,547)	(26,966)
Deferred Tax Liabilities, Gross	(272,733)	(222,562)
Valuation allowance	(83,953)	(92,589)
Net deferred tax asset (liability)	$ 170,107	$ 275,579