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Quarterly Historical Data (Unaudited):
12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Historical Data (Unaudited)
QUARTERLY HISTORICAL DATA (Unaudited)

The Company operates on a calendar year basis. The following tables set forth select unaudited historical operating results and market data for each quarter of 2015 and 2014.
 
First Quarter
Second Quarter
Third
Quarter
Fourth Quarter
 
(in thousands, except per share amounts, dividends and common stock prices)
2015
 
 
 
 
Revenue
$
441,987

$
272,254

$
272,105

$
318,259

Operating income (loss)
$
70,500

$
(38,858
)
$
(2,044
)
$
197

Income (loss) from continuing operations
$
33,850

$
(41,842
)
$
(9,943
)
$
(14,176
)
Net income (loss) available for common stock
$
33,850

$
(41,842
)
$
(9,943
)
$
(14,176
)
 
 
 
 
 
Income (loss) per share - Basic
$
0.76

$
(0.94
)
$
(0.22
)
$
(0.30
)
 
 
 
 
 
Income (loss) per share - Diluted
$
0.76

$
(0.94
)
$
(0.22
)
$
(0.30
)
 
 
 
 
 
Dividends paid per share
$
0.405

$
0.405

$
0.405

$
0.405

 
 
 
 
 
Common stock prices - High
$
53.37

$
52.96

$
47.27

$
47.51

Common stock prices - Low
$
47.88

$
43.48

$
36.81

$
40.00




 
First Quarter
Second Quarter
Third
Quarter
Fourth
Quarter
 
(in thousands, except per share amounts, dividends and common stock prices)
2014
 
 
 
 
Revenue
$
460,169

$
283,237

$
272,087

$
378,077

Operating income (loss)
$
90,432

$
47,412

$
55,238

$
70,786

Income (loss) from continuing operations
$
48,645

$
20,347

$
27,363

$
34,534

Net income (loss) available for common stock
$
48,645

$
20,347

$
27,363

$
34,534

 
 
 
 
 
Income (loss) per share - Basic
$
1.10

$
0.46

$
0.61

$
0.78

 
 
 
 
 
Income (loss) per share - Diluted
$
1.09

$
0.46

$
0.61

$
0.77

 
 
 
 
 
Dividends paid per share
$
0.390

$
0.390

$
0.390

$
0.390

 
 
 
 
 
Common stock prices - High
$
59.05

$
61.41

$
62.13

$
57.17

Common stock prices - Low
$
51.09

$
55.23

$
47.87

$
47.11