Goodwill and Other Intangibles (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
May 31, 2012
Goodwill [Roll Forward]      
Balance at beginning of year $ 36,756 $ 10,171  
BNS sale of SWH to Steel Excel (24,836) 0  
Impairment (192) 0  
Other 5 (4)  
Balance at end of year 63,622 36,756  
Steel Excel
     
Goodwill [Roll Forward]      
Balance at beginning of year     48,468
Acquisition 48,468 0  
Balance at end of year     48,468
Hickman
     
Goodwill [Roll Forward]      
Acquisition 3,267 0  
Other Companies
     
Goodwill [Roll Forward]      
Acquisition 154 0  
SWH
     
Goodwill [Roll Forward]      
Acquisition 0 24,836  
Tiger Claw
     
Goodwill [Roll Forward]      
Acquisition $ 0 $ 1,753