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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net sales $ 1,012,799 $ 748,252 $ 802,291
Cost of goods sold 438,174 329,258 367,803
Gross profit 574,625 418,994 434,488
Expenses:      
Selling, general and administrative 456,267 377,288 407,456
Other expense (income), net 54 (34,899) (405)
Total expenses 456,321 342,389 407,051
Income before interest and income taxes 118,304 76,605 27,437
Interest income, net 231 126 1,287
Income before income taxes 118,535 76,731 28,724
Income tax expense 27,732 17,583 6,859
Net income 90,803 59,148 21,865
Other comprehensive income (loss), net of tax:      
Defined benefit pension plan adjustments; net of tax expense (benefit) of $89, $(159) and $(238) 267 (473) (622)
Comprehensive income $ 91,070 $ 58,675 $ 21,243
Common Stock [Member]      
Other comprehensive income (loss), net of tax:      
Basic earnings per share (in dollars per share) $ 5.06 $ 3.18 $ 1.10
Diluted earnings per share (in dollars per share) 4.90 3.12 1.08
Class A Common Stock [Member]      
Other comprehensive income (loss), net of tax:      
Basic earnings per share (in dollars per share) 4.75 3.04 1.04
Diluted earnings per share (in dollars per share) $ 4.69 $ 3.04 $ 1.03