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Condensed Consolidated Unaudited Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Common Stock, Class B Common Stock and Preferred Stock [Member]
Paid-In Capital [Member]
Accumulated Other Comprehensive Loss [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Non-controlling Interest [Member]
Beginning balance at Dec. 31, 2022 $ 2,248,278 $ 21,811 $ 973,060 $ (47,710) $ 1,029,516 $ (87,440) $ 359,041
Beginning balance (in shares) at Dec. 31, 2022   38,749,887          
Net income 130,371       110,073   20,298
Other comprehensive income (loss) 260     170     90
Issuances of restricted shares of common stock   $ 58 (58)        
Issuances of restricted shares of common stock (in shares)   116,510          
Forfeitures of restricted shares of common stock   $ (1) 1        
Forfeitures of restricted shares of common stock (in shares)   (2,000)          
Common stock contribution to 401(k) plan 8,862 $ 18 8,844        
Common stock contribution to 401(k) plan (in shares)   35,533          
Stock issuances from exercise of stock options and employee stock purchase plan 12,985 $ 38 12,947        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   75,186          
Issuance of Class B common stock 200   200        
Issuance of Class B common stock (in shares)   632          
Retirement of common stock (6,452) $ (11) (6,441)        
Retirement of common stock (in shares)   (21,702)          
Share-based compensation 8,763   8,763        
Cash dividends declared and paid on Common and Class B common stock (94,970)       (94,970)    
Ending balance at Mar. 31, 2023 2,308,297 $ 21,913 997,316 (47,540) 1,044,619 (87,440) 379,429
Ending balance (in shares) at Mar. 31, 2023   38,954,046          
Beginning balance at Dec. 31, 2022 2,248,278 $ 21,811 973,060 (47,710) 1,029,516 (87,440) 359,041
Beginning balance (in shares) at Dec. 31, 2022   38,749,887          
Net income 536,398            
Other comprehensive income (loss) 409            
Ending balance at Sep. 30, 2023 2,665,762 $ 22,111 1,138,749 (47,405) 1,197,184 (86,630) 441,753
Ending balance (in shares) at Sep. 30, 2023   39,394,529          
Beginning balance at Mar. 31, 2023 2,308,297 $ 21,913 997,316 (47,540) 1,044,619 (87,440) 379,429
Beginning balance (in shares) at Mar. 31, 2023   38,954,046          
Net income 205,403       172,764   32,639
Other comprehensive income (loss) 7,115     4,780     2,335
Issuances of restricted shares of common stock   $ 19 (19)        
Issuances of restricted shares of common stock (in shares)   38,000          
Forfeitures of restricted shares of common stock (in shares)   (467)          
Stock issuances from exercise of stock options and employee stock purchase plan 5,637 $ 15 5,622        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   30,794          
Retirement of common stock (595) $ (1) (594)        
Retirement of common stock (in shares)   (1,737)          
Net proceeds from the sale of Common stock 14,804   13,994     810  
Net proceeds from the sale of Common stock (in shares)   45,000          
Share-based compensation 6,828   6,828        
Cash dividends declared and paid on Common and Class B common stock (95,439)       (95,439)    
Ending balance at Jun. 30, 2023 2,452,050 $ 21,946 1,023,147 (42,760) 1,121,944 (86,630) 414,403
Ending balance (in shares) at Jun. 30, 2023   39,065,636          
Net income 200,624       170,953   29,671
Other comprehensive income (loss) (6,966)     (4,645)     (2,321)
Issuances of restricted shares of common stock   $ 7 (7)        
Issuances of restricted shares of common stock (in shares)   13,607          
Forfeitures of restricted shares of common stock   $ (1) 1        
Forfeitures of restricted shares of common stock (in shares)   (1,000)          
Stock issuances from exercise of stock options and employee stock purchase plan 6,629 $ 19 6,610        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   37,399          
Retirement of common stock (467)   (467)        
Retirement of common stock (in shares)   (1,328)          
Common stock issued for Commercial Specialists, Inc. 102,343 $ 140 102,203        
Common stock issued for Commercial Specialists, Inc. (in shares)   280,215          
Share-based compensation 7,262   7,262        
Cash dividends declared and paid on Common and Class B common stock (95,713)       (95,713)    
Ending balance at Sep. 30, 2023 2,665,762 $ 22,111 1,138,749 (47,405) 1,197,184 (86,630) 441,753
Ending balance (in shares) at Sep. 30, 2023   39,394,529          
Beginning balance at Dec. 31, 2023 2,616,190 $ 22,134 1,153,459 (42,331) 1,183,207 (86,630) 386,351
Beginning balance (in shares) at Dec. 31, 2023   39,441,280          
Net income 104,262       87,004   17,258
Other comprehensive income (loss) (8,000)     (5,539)     (2,461)
Issuances of restricted shares of common stock   $ 44 (44)        
Issuances of restricted shares of common stock (in shares)   87,660          
Forfeitures of restricted shares of common stock   $ (6) 6        
Forfeitures of restricted shares of common stock (in shares)   (12,064)          
Common stock contribution to 401(k) plan 8,735 $ 10 8,725        
Common stock contribution to 401(k) plan (in shares)   20,387          
Stock issuances from exercise of stock options and employee stock purchase plan 10,746 $ 27 10,719        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   53,029          
Retirement of common stock (565) $ (1) (564)        
Retirement of common stock (in shares)   (1,425)          
Net proceeds from the sale of Common stock 281,751   268,931     12,820  
Net proceeds from the sale of Common stock (in shares)   712,000          
Common stock issued for Commercial Specialists, Inc. 752 $ 1 751        
Common stock issued for Commercial Specialists, Inc. (in shares)   1,904          
Share-based compensation 10,467   10,467        
Cash dividends declared and paid on Common and Class B common stock (96,765)       (96,765)    
Ending balance at Mar. 31, 2024 2,927,573 $ 22,209 1,452,450 (47,870) 1,173,446 (73,810) 401,148
Ending balance (in shares) at Mar. 31, 2024   40,302,771          
Beginning balance at Dec. 31, 2023 2,616,190 $ 22,134 1,153,459 (42,331) 1,183,207 (86,630) 386,351
Beginning balance (in shares) at Dec. 31, 2023   39,441,280          
Net income 520,560            
Other comprehensive income (loss) (6,527)            
Ending balance at Sep. 30, 2024 3,161,871 $ 22,242 1,486,504 (46,888) 1,308,166 (73,649) 465,496
Ending balance (in shares) at Sep. 30, 2024   40,381,766          
Beginning balance at Mar. 31, 2024 2,927,573 $ 22,209 1,452,450 (47,870) 1,173,446 (73,810) 401,148
Beginning balance (in shares) at Mar. 31, 2024   40,302,771          
Net income 214,651       181,410   33,241
Other comprehensive income (loss) (3,336)     (2,300)     (1,036)
Issuances of restricted shares of common stock   $ 5 (5)        
Issuances of restricted shares of common stock (in shares)   10,000          
Forfeitures of restricted shares of common stock   $ (3) 3        
Forfeitures of restricted shares of common stock (in shares)   (5,750)          
Stock issuances from exercise of stock options and employee stock purchase plan 8,158 $ 18 8,140        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   36,754          
Retirement of common stock (2,444) $ (2) (2,442)        
Retirement of common stock (in shares)   (5,279)          
Share-based compensation 8,390   8,390        
Cash dividends declared and paid on Common and Class B common stock (108,803)       (108,803)    
Dividend reinvestment plan 1   1        
Dividend reinvestment plan (in shares)   4          
Ending balance at Jun. 30, 2024 3,044,190 $ 22,227 1,466,537 (50,170) 1,246,053 (73,810) 433,353
Ending balance (in shares) at Jun. 30, 2024   40,338,500          
Net income 201,647       171,031   30,616
Other comprehensive income (loss) 4,809     3,282     1,527
Issuances of restricted shares of common stock   $ 4 (4)        
Issuances of restricted shares of common stock (in shares)   8,500          
Stock issuances from exercise of stock options and employee stock purchase plan 6,681 $ 12 6,669        
Stock issuances from exercise of stock options and employee stock purchase plan (in shares)   24,826          
Retirement of common stock (1,638) $ (1) (1,637)        
Retirement of common stock (in shares)   (3,454)          
Share-based compensation 8,546   8,546        
Cash dividends declared and paid on Common and Class B common stock (108,918)       (108,918)    
Dividend reinvestment plan 6,554   6,393     161  
Dividend reinvestment plan (in shares)   13,394          
Ending balance at Sep. 30, 2024 $ 3,161,871 $ 22,242 $ 1,486,504 $ (46,888) $ 1,308,166 $ (73,649) $ 465,496
Ending balance (in shares) at Sep. 30, 2024   40,381,766