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Selected Quarterly Data (Unaudited)
 12 Months Ended
Dec. 31, 2018
Quarterly Financial Data [Abstract]  
Selected Quarterly Data (Unaudited)
Selected Quarterly Data (Unaudited)
 
 
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
In thousands, except per share amounts
 
2018
 
2017
 
2018
 
2017
 
2018
 
2017
 
2018
 
2017
Revenues
 
$
81,198

 
$
94,894

 
$
69,633

 
$
94,722

 
$
63,588

 
$
94,424

 
$
70,209

 
$
99,866

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Operating income (loss)
 
(5,035
)
 
(6,342
)
 
(6,308
)
 
(1,791
)
 
(10,353
)
 
950

 
(4,338
)
 
(33,682
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income (loss) before income taxes
 
23,849

 
(8,862
)
 
(7,318
)
 
(4,852
)
 
(11,421
)
 
(2,098
)
 
(5,673
)
 
(35,942
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income (loss)
 
$
32,629

 
$
(7,386
)
 
$
(6,734
)
 
$
(2,653
)
 
$
(9,984
)
 
$
(2,480
)
 
$
1,639

 
$
(29,341
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic earnings (loss) per common share
 
$
5.24


$
(1.20
)

$
(1.10
)

$
(0.43
)

$
(1.62
)

$
(0.40
)

$
0.21


$
(4.73
)
Diluted earnings (loss) per common share
 
$
4.67


$
(1.20
)

$
(1.10
)

$
(0.43
)

$
(1.62
)

$
(0.40
)

$
0.21


$
(4.73
)


Earnings per common share amounts are computed independently for each of the quarters presented. Therefore, the sum of the quarterly earnings per share amounts may not equal the quarterly earnings per share amounts or the annual earnings per share amounts due to rounding.