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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Class A Common Stock
Common Stock
Class B Common Stock
Capital in Excess of Par Value
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Balance, beginning of period at Dec. 31, 2022 $ 426,966 $ 5,783 $ 1,566 $ 23,706 $ 404,924 $ (9,013)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation 564 161   403    
Net income (loss) 5,692       5,692  
Cash dividends on Class A and Class B common stock (1,557)       (1,557)  
Reclassification adjustment to net income, net of tax 21         21
Balance, end of period at Mar. 31, 2023 431,686 5,944 1,566 24,109 409,059 (8,992)
Balance, beginning of period at Dec. 31, 2022 426,966 5,783 1,566 23,706 404,924 (9,013)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 4,380          
Balance, end of period at Sep. 30, 2023 428,445 5,940 1,566 25,415 404,478 (8,954)
Balance, beginning of period at Mar. 31, 2023 431,686 5,944 1,566 24,109 409,059 (8,992)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation 807 10   797    
Net income (loss) 2,520       2,520  
Cash dividends on Class A and Class B common stock (1,633)       (1,633)  
Reclassification adjustment to net income, net of tax 18         18
Balance, end of period at Jun. 30, 2023 433,398 5,954 1,566 24,906 409,946 (8,974)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation 1,319 10   1,309    
Purchase of treasury shares (824) (24)   (800)    
Net income (loss) (3,832)       (3,832)  
Cash dividends on Class A and Class B common stock (1,636)       (1,636)  
Reclassification adjustment to net income, net of tax 20         20
Balance, end of period at Sep. 30, 2023 428,445 5,940 1,566 25,415 404,478 (8,954)
Balance, beginning of period at Dec. 31, 2023 382,340 5,883 1,566 28,672 355,873 (9,654)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation 531 130   401    
Purchase of treasury shares (4,274) (128)     (4,146)  
Net income (loss) 4,570       4,570  
Cash dividends on Class A and Class B common stock (1,630)       (1,630)  
Reclassification adjustment to net income, net of tax 76         76
Balance, end of period at Mar. 31, 2024 381,613 5,885 1,566 29,073 354,667 (9,578)
Balance, beginning of period at Dec. 31, 2023 382,340 5,883 1,566 28,672 355,873 (9,654)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 26,177          
Balance, end of period at Sep. 30, 2024 397,310 5,732 1,566 31,621 367,814 (9,423)
Balance, beginning of period at Mar. 31, 2024 381,613 5,885 1,566 29,073 354,667 (9,578)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation 1,389 11   1,378    
Purchase of treasury shares (3,285) (108)     (3,177)  
Net income (loss) 5,972       5,972  
Cash dividends on Class A and Class B common stock (1,676)       (1,676)  
Reclassification adjustment to net income, net of tax 77         77
Balance, end of period at Jun. 30, 2024 384,090 5,788 1,566 30,451 355,786 (9,501)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation 1,182 12   1,170    
Purchase of treasury shares (2,017) (68)     (1,949)  
Net income (loss) 15,635       15,635  
Cash dividends on Class A and Class B common stock (1,658)       (1,658)  
Reclassification adjustment to net income, net of tax 78         78
Balance, end of period at Sep. 30, 2024 $ 397,310 $ 5,732 $ 1,566 $ 31,621 $ 367,814 $ (9,423)