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Quarterly Information (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information


						2020																								2019
						March 31						June 30						September 30						December 31						March 31						June 30						September 30						December 31
						(Dollars in thousands, except per share amounts)
As Reported:
Net Sales						$	318,646					$	280,718					$	286,987					$	338,010					$	474,994					$	480,390					$	420,797					$	414,612
Gross profit						179,729						150,118						155,125						175,525						279,470						283,343						242,300						235,290
Research and development						712						710						650						1,903						637						713						611						723
Selling and administrative expenses						14,932						16,001						19,062						17,918						15,226						15,394						15,708						17,346
Other expense (income), net						(3,314)						311						694						5,639						467						863						(688)						4,561
Related party Tax Receivable Agreement (benefit) expense						(3,346)						—						—						(17,744)						—						—						—						3,393
Interest Expense						25,672						20,880						22,474						29,048						33,700						32,969						31,803						28,859
Interest Income						(1,141)						(348)						(93)						(168)						(414)						(731)						(1,765)						(1,799)
Net income						122,268						92,776						94,234						125,096						197,436						196,368						175,876						174,922
Net income per share						$	0.45					$	0.35					$	0.35					$	0.47					$	0.68					$	0.68					$	0.61					$	0.61