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CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
AOCI Attributable to Parent
Retained Earnings
Treasury shares
Parent
Beginning balance (in shares) at Dec. 31, 2021   18,111          
Par value, beginning balance at Dec. 31, 2021   $ 25          
Beginning balance at Dec. 31, 2021 $ 1,223,552   $ 692,053 $ 2,056 $ 1,167,475 $ (638,057)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   161          
Share-based compensation     11,580       $ 11,580
Stock issued under employee stock purchase plan (in shares)   30          
Stock issued under employee stock purchase plan           4,725 4,725
Other comprehensive income (902)     (902)     (902)
Net income (loss)         (49,982)   (49,982)
Ending balance (in shares) at Sep. 30, 2022   18,302          
Par value, ending balance at Sep. 30, 2022   $ 25          
Ending balance at Sep. 30, 2022 1,188,973   703,633 1,154 1,117,493 (633,332)  
Beginning balance (in shares) at Jun. 30, 2022   18,180          
Par value, beginning balance at Jun. 30, 2022   $ 25          
Beginning balance at Jun. 30, 2022 1,232,371   698,982 2,744 1,163,952 (633,332)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   122          
Share-based compensation     4,651       4,651
Other comprehensive income (1,590)     (1,590)     (1,590)
Net income (loss)         (46,459)   (46,459)
Ending balance (in shares) at Sep. 30, 2022   18,302          
Par value, ending balance at Sep. 30, 2022   $ 25          
Ending balance at Sep. 30, 2022 1,188,973   703,633 1,154 1,117,493 (633,332)  
Beginning balance (in shares) at Dec. 31, 2022   18,128          
Par value, beginning balance at Dec. 31, 2022 25 $ 25          
Beginning balance at Dec. 31, 2022 1,220,698   709,471 1,257 1,169,968 (660,023)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   415          
Share-based compensation   $ 1 24,661       24,662
Shares repurchased by the Company and held as treasury shares (in shares)   (173)          
Shares repurchased by the Company and held as treasury shares           (16,853) (16,853)
Cash dividends         (11,084)   (11,084)
Stock issued under employee stock purchase plan (in shares)   41          
Stock issued under employee stock purchase plan           4,232 4,232
Other comprehensive income 1,938     1,938     1,938
Net income (loss)         119,552   119,552
Ending balance (in shares) at Sep. 30, 2023   18,411          
Par value, ending balance at Sep. 30, 2023 26 $ 26          
Ending balance at Sep. 30, 2023 1,343,145   734,132 3,195 1,278,436 (672,644)  
Beginning balance (in shares) at Jun. 30, 2023   18,450          
Par value, beginning balance at Jun. 30, 2023   $ 26          
Beginning balance at Jun. 30, 2023 1,373,561   727,534 2,639 1,314,586 (671,224)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   (23)          
Share-based compensation   $ 0 6,598       6,598
Shares repurchased by the Company and held as treasury shares (in shares)   (16)          
Shares repurchased by the Company and held as treasury shares           (1,420) (1,420)
Cash dividends         (11,084)   (11,084)
Other comprehensive income 556     556     556
Net income (loss)         (25,066)   $ (25,066)
Ending balance (in shares) at Sep. 30, 2023   18,411          
Par value, ending balance at Sep. 30, 2023 26 $ 26          
Ending balance at Sep. 30, 2023 $ 1,343,145   $ 734,132 $ 3,195 $ 1,278,436 $ (672,644)