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Quarterly Financial Information (unaudited)
12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Information (unaudited) Quarterly Financial Information (unaudited), see accompanying accountants' report
Quarterly financial information for fiscal years 2019 and 2018 are presented in the following table (dollars in thousands), except per share data:
 
1st Quarter
 
2nd Quarter
 
3rd Quarter
 
4th Quarter
2019
 

 
 

 
 

 
 

Revenues
$
85,474

 
$
104,695

 
$
102,140

 
100,446

Total costs and expenses
60,046

 
62,097

 
62,411

 
59,630

Operating earnings
25,428

 
42,598

 
39,729

 
40,816

Net earnings
18,340

 
32,727

 
28,860

 
33,129

Earnings per share, basic
0.35

 
0.62

 
0.55

 
0.63

Earnings per share, diluted
0.34

 
0.61

 
0.54

 
0.62

2018
 
 
 
 
 
 
 
Revenues
$
90,429

 
$
99,538

 
$
102,996

 
$
115,934

Total costs and expenses
59,035

 
63,818

 
65,521

 
76,079

Operating earnings
31,394

 
35,720

 
37,475

 
39,855

Net earnings
26,352

 
30,737

 
28,011

 
25,893

Earnings per share, basic
0.51

 
0.59

 
0.54

 
0.50

Earnings per share, diluted
0.49

 
0.57

 
0.52

 
0.48