Income Taxes - Deferred Tax Assets And Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Accounts receivable	$ 14,384	$ 7,063
Inventories	44,597	50,585
Employee benefits	39,526	36,068
Accrued expenses and other	103,892	67,638
Deductible state tax and interest benefit	4,042	3,665
Intangibles	152,499	146,953
Lease liabilities	91,359	86,717
Federal, foreign and state net operating losses and credits	433,822	376,375
Gross deferred tax assets	884,121	775,064
Valuation allowance	(267,838)	(232,196)
Net deferred tax assets	616,283	542,868
Inventories	(17,403)	(12,885)
Plant and equipment	(489,240)	(510,952)
Intangibles	(197,009)	(182,424)
Right of use assets	(87,351)	(83,271)
Prepaids	(56,140)	0
Other liabilities	(46,121)	(24,220)
Gross deferred tax liabilities	(893,264)	(813,752)
Net deferred tax liability	$ (276,981)	$ (270,884)