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Discontinued Operations (Tables)
 12 Months Ended
Dec. 31, 2013
Discontinued Operations [Abstract]  
Discontinued operations
Discontinued operations included the following amounts of operating revenue and loss before income taxes:

 
 
Years Ended December 31,
 
 
 
2013
  
2012
  
2011
 
 
 
(in thousands)
 
 
 
  
  
 
Operating revenues
 
$
-
  
$
1,091
  
$
10,516
 
Loss before income taxes
 
$
-
  
$
(496
)
 
$
(904
)