Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Financial Data
 
First
 
Second
 
Third
 
Fourth
 
(in thousands, except per share amounts)
2014
 

 
 

 
 

 
 

Operating revenues
$
955,781

 
$
951,981

 
$
926,727

 
$
854,231

Operating loss
(212,290
)
 
(350,553
)
 
(212,900
)
 
(335,737
)
Net loss from continuing operations
(338,270
)
 
(474,983
)
 
(456,753
)
 
(507,306
)
Net (loss) income from discontinued operations
(37,808
)
 
(148,329
)
 
13,306

 
(7,555
)
Net loss from continuing operations, per common share, basic and diluted
$
(1.97
)
 
$
(2.76
)
 
$
(2.65
)
 
$
(2.95
)
Net (loss) income from discontinued operations, per common share, basic and diluted
$
(0.22
)
 
$
(0.86
)
 
$
0.08

 
$
(0.04
)

 
First
 
Second
 
Third
 
Fourth
 
(in thousands, except per share amounts)
2013
 

 
 

 
 

 
 

Operating revenues
$
1,316,716

 
$
1,245,451

 
$
1,085,633

 
$
1,063,767

Operating loss
(44,397
)
 
(40,653
)
 
(127,889
)
 
(155,666
)
Net loss from continuing operations
(153,103
)
 
(316,018
)
 
(259,507
)
 
(705,460
)
Net loss from discontinued operations
(54,400
)
 
(80,334
)
 
(40,434
)
 
(40,343
)
Net loss from continuing operations, per common share, basic and diluted
$
(0.89
)
 
$
(1.83
)
 
$
(1.51
)
 
$
(4.10
)
Net loss from discontinued operations, per common share, basic and diluted
$
(0.32
)
 
$
(0.47
)
 
$
(0.23
)
 
$
(0.23
)