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Quarterly Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Interim Period, Costs Not Allocable [Line Items]                        
Net sales                   $ 1,224,361 $ 1,790,793 $ 1,895,910
Gross profit                   660,497 1,040,403 1,190,212
Research and development                   3,975 2,684 2,129
Selling and administrative expenses                   67,913 63,674 62,032
Other expense                   3,330 5,203 3,361
Related party Tax Receivable Agreement (benefit) expense                   (21,090) 3,393 86,478
Interest expense                   98,074 127,331 135,061
Investment Income, Interest                   (1,750) (4,709) (1,657)
Net income (loss)                 $ 854,219 $ 434,374 $ 744,602 $ 854,219
Income (Loss) from Continuing Operations, Per Basic Share                   $ 1.62 $ 2.58 $ 2.87
Earnings Per Share, Basic                   $ 1.62 $ 2.58 $ 2.87
As Reported                        
Interim Period, Costs Not Allocable [Line Items]                        
Net sales $ 338,010 $ 286,987 $ 280,718 $ 318,646 $ 414,612 $ 420,797 $ 480,390 $ 474,994        
Gross profit 175,525 155,125 150,118 179,729 235,290 242,300 283,343 279,470        
Research and development 1,903 650 710 712 723 611 713 637        
Selling and administrative expenses 17,918 19,062 16,001 14,932 17,346 15,708 15,394 15,226        
Other expense 5,639 694 311 (3,314) 4,561 (688) 863 467        
Related party Tax Receivable Agreement (benefit) expense (17,744) 0 0 (3,346) 3,393 0 0 0        
Interest expense 29,048 22,474 20,880 25,672 28,859 31,803 32,969 33,700        
Investment Income, Interest (168) (93) (348) (1,141) (1,799) (1,765) (731) (414)        
Net income (loss) $ 125,096 $ 94,234 $ 92,776 $ 122,268 $ 174,922 $ 175,876 $ 196,368 $ 197,436        
Earnings Per Share, Basic $ 470 $ 350 $ 350 $ 450 $ 610 $ 610 $ 680 $ 680