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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
CONSOLIDATED STATEMENTS OF OPERATIONS      
REVENUES $ 5,324,052 $ 3,980,067 $ 2,940,163
OPERATING EXPENSES 4,924,783 3,699,081 2,841,885
OPERATING INCOME 399,269 280,986 98,278
OTHER INCOME (COSTS)      
Interest and dividend income 3,957 1,275 3,616
Interest and other related financing costs (7,701) (8,904) (11,697)
Other, net (2,370) 3,797 2,299
TOTAL OTHER INCOME (COSTS) (6,114) (3,832) (5,782)
INCOME BEFORE INCOME TAXES 393,155 277,154 92,496
INCOME TAX PROVISION 94,946 63,633 21,396
NET INCOME $ 298,209 $ 213,521 $ 71,100
EARNINGS PER COMMON SHARE      
Basic $ 12.13 $ 8.38 $ 2.80
Diluted $ 11.69 $ 7.98 $ 2.69
AVERAGE COMMON SHARES OUTSTANDING      
Basic 24,585,205 25,471,939 25,410,232
Diluted 25,504,508 26,772,126 26,422,523