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Quarterly Information
12 Months Ended
Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Information (unaudited) Quarterly information (unaudited)
(Expressed in thousands, except per share amounts)   
 Fiscal Quarters 
For the Year Ended December 31, 2020FourthThirdSecondFirstYear
Revenue$422,908 $276,259 $264,730 $234,770 $1,198,667 
Expenses309,113 254,541 241,466 224,547 1,029,667 
Income before income taxes113,795 21,718 23,264 10,223 169,000 
Income taxes31,915 6,079 5,615 2,405 46,014 
Net income$81,880 $15,639 $17,649 $7,818 $122,986 
Basic net income per share$6.56 $1.25 $1.40 $0.61 $9.73 
Diluted net income per share$6.17 $1.19 $1.34 $0.58 $9.30 
Dividends paid per share$1.12 $0.12 $0.12 $0.12 $1.48 
Market price of Class A Stock (1)
High$33.21 $26.11 $24.42 $28.38 $33.21 
Low$22.29 $20.33 $17.20 $14.88 $14.88 
 
(1) The price quotations above were obtained from the New York Stock Exchange website.

(Expressed in thousands, except per share amounts)   
 Fiscal Quarters 
For the Year Ended December 31, 2019FourthThirdSecondFirstYear
Revenue$295,881 $234,793 $250,935 $251,770 $1,033,379 
Expenses260,908 228,297 233,544 235,718 958,467 
Income before income taxes34,973 6,496 17,391 16,052 74,912 
Income taxes9,538 2,547 5,016 4,858 21,959 
Net income$25,435 $3,949 $12,375 $11,194 $52,953 
Basic net income per share$1.99 $0.31 $0.95 $0.86 $4.10 
Diluted net income per share$1.83 $0.29 $0.89 $0.81 $3.82 
Dividends paid per share$0.12 $0.12 $0.11 $0.11 $0.46 
Market price of Class A Stock (1)
High$29.25 $31.30 $27.42 $28.73 $31.30 
Low$27.09 $26.42 $24.34 $25.25 $24.34 
 
(1) The price quotations above were obtained from the New York Stock Exchange website.