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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, 2022   18,128          
Par value, beginning balance at Dec. 31, 2022   $ 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)   438          
Share-based compensation   $ 1 18,063       $ 18,064
Shares repurchased by the Company and held as treasury shares (in shares)   (157)          
Shares repurchased by the Company and held as treasury shares           (15,433) (15,433)
Stock issued under employee stock purchase plan (in shares)   41          
Stock issued under employee stock purchase plan           4,232 4,232
Other comprehensive income (loss)       1,382     1,382
Net income         144,618   144,618
Ending balance (in shares) at Jun. 30, 2023   18,450          
Par value, ending balance at Jun. 30, 2023   $ 26          
Ending balance at Jun. 30, 2023 1,373,561   727,534 2,639 1,314,586 (671,224)  
Beginning balance (in shares) at Mar. 31, 2023   17,998          
Par value, beginning balance at Mar. 31, 2023   $ 25          
Beginning balance at Mar. 31, 2023 1,271,397   714,506 3,242 1,226,117 (672,493)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   443          
Share-based compensation   $ 1 13,028       13,029
Shares repurchased by the Company and held as treasury shares (in shares)   (32)          
Shares repurchased by the Company and held as treasury shares           (2,963) (2,963)
Stock issued under employee stock purchase plan (in shares)   41          
Stock issued under employee stock purchase plan           4,232 4,232
Other comprehensive income (loss)       (603)     (603)
Net income         88,469   88,469
Ending balance (in shares) at Jun. 30, 2023   18,450          
Par value, ending balance at Jun. 30, 2023   $ 26          
Ending balance at Jun. 30, 2023 1,373,561   727,534 2,639 1,314,586 (671,224)  
Beginning balance (in shares) at Dec. 31, 2023   18,269          
Par value, beginning balance at Dec. 31, 2023 26 $ 26          
Beginning balance at Dec. 31, 2023 1,328,560   741,055 3,991 1,265,420 (681,932)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   5          
Share-based compensation     13,200       13,200
Shares repurchased by the Company and held as treasury shares (in shares)   (46)          
Shares repurchased by the Company and held as treasury shares           (3,023) (3,023)
Stock issued under employee stock purchase plan (in shares)   90          
Stock issued under employee stock purchase plan           4,914 4,914
Cash dividends         (21,934)   (21,934)
Other comprehensive income (loss)       (1,462)     (1,462)
Net income         12,780   12,780
Ending balance (in shares) at Jun. 30, 2024   18,318          
Par value, ending balance at Jun. 30, 2024 26 $ 26          
Ending balance at Jun. 30, 2024 1,333,035   754,255 2,529 1,256,266 (680,041)  
Beginning balance (in shares) at Mar. 31, 2024   18,282          
Par value, beginning balance at Mar. 31, 2024   $ 26          
Beginning balance at Mar. 31, 2024 1,322,156   747,873 2,783 1,253,549 (682,075)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Share-based compensation (in shares)   (10)          
Share-based compensation     6,382       6,382
Shares repurchased by the Company and held as treasury shares (in shares)   (44)          
Shares repurchased by the Company and held as treasury shares           (2,880) (2,880)
Stock issued under employee stock purchase plan (in shares)   90          
Stock issued under employee stock purchase plan           4,914 4,914
Cash dividends         (10,982)   (10,982)
Other comprehensive income (loss)       (254)     (254)
Net income         13,699   $ 13,699
Ending balance (in shares) at Jun. 30, 2024   18,318          
Par value, ending balance at Jun. 30, 2024 26 $ 26          
Ending balance at Jun. 30, 2024 $ 1,333,035   $ 754,255 $ 2,529 $ 1,256,266 $ (680,041)