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Quarterly Financial Data
 12 Months Ended
Dec. 31, 2019
Text Block [Abstract]  
Quarterly Financial Data (Unaudited) QUARTERLY FINANCIAL DATA (UNAUDITED)
In our opinion, the quarterly financial information shown below includes all adjustments necessary for a fair presentation of the operations for such periods. Due to the seasonal nature of our business, there are substantial variations in operations reported on a quarterly basis.
 
For the Quarters Ended
 
March 31
 
June 30
 
September 30
 
December 31
(in thousands except per share amounts)
 
 
 
 
 
 
 
2019 (1)
 
 
 
 
 
 
 
Operating Revenues
$
160,464

 
$
94,541

 
$
92,626

 
$
131,973

Operating Income
$
44,123

 
$
18,164

 
$
14,358

 
$
29,642

Net Income:
 
 
 
 
 
 
 
Income from Continuing Operations
$
28,814

 
$
8,913

 
$
6,246

 
$
17,169

Loss from Discontinued Operations, Net of Tax
(149
)
 
(609
)
 
(624
)
 
(9
)
Gain on sale of Discontinued Operations, Net of Tax
—

 
—

 
—

 
5,402

 
$
28,665


$
8,304


$
5,622


$
22,562

Basic Earnings Per Share of Common Stock:
 
 
 
 
 
 
 
Earnings Per Share from Continuing Operations
$
1.76

 
$
0.54

 
$
0.38

 
$
1.05

Earnings/(Loss) Per Share from Discontinued Operations
(0.01
)
 
(0.03
)
 
(0.04
)
 
0.33

 
$
1.75


$
0.51


$
0.34


$
1.38

Diluted Earnings Per Share of Common Stock:
 
 
 
 
 
 
 
Earnings Per Share from Continuing Operations
$
1.75

 
$
0.54

 
$
0.38

 
$
1.04

Earnings/(Loss) Per Share from Discontinued Operations
(0.01
)
 
(0.04
)
 
(0.04
)
 
0.33

 
$
1.74


$
0.50


$
0.34


$
1.37

2018 (1)
 
 
 
 
 
 
 
Operating Revenues
$
168,831

 
$
93,872

 
$
93,400

 
$
134,214

Operating Income
$
40,853

 
$
12,238

 
$
12,879

 
$
28,873

Net Income:
 
 
 
 
 
 
 
Income from Continuing Operations
$
27,271

 
$
5,705

 
$
6,090

 
$
17,796

Income/(Loss) from Discontinued Operations
(415
)
 
680

 
(552
)
 
5

 
$
26,856


$
6,385


$
5,538


$
17,801

Basic Earnings Per Share of Common Stock:
 
 
 
 
 
 
 
Earnings Per Share from Continuing Operations
$
1.67

 
$
0.35

 
$
0.37

 
$
1.09

Earnings/(Loss) Per Share from Discontinued Operations
(0.03
)
 
0.04

 
(0.03
)
 
—

 
$
1.64


$
0.39


$
0.34


$
1.09

Diluted Earnings Per Share of Common Stock:
 
 
 
 
 
 
 
Earnings Per Share from Continuing Operations
$
1.66

 
$
0.35

 
$
0.37

 
$
1.09

Earnings/(Loss) Per Share from Discontinued Operations
(0.02
)
 
0.04

 
(0.04
)
 
—

 
$
1.64


$
0.39


$
0.33


$
1.09

(1) The sum of the four quarters does not equal the total for the year due to rounding.