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Related Party Transactions (Detail) (USD $)
3 Months Ended 6 Months Ended 10 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2013
SP Corporate Services LLC [Member]
Jun. 30, 2012
SP Corporate Services LLC [Member]
Jun. 30, 2013
SP Corporate Services LLC [Member]
Jun. 30, 2012
SP Corporate Services LLC [Member]
Jul. 31, 2012
SP Corporate Services LLC [Member]
Monthly Fees for Financial Management and Administrative Services [Member]
Jun. 30, 2013
SP Corporate Services LLC [Member]
Monthly Expanded Services [Member]
Jun. 30, 2013
WebBank [Member]
Short-term Deposits [Member]
Jun. 30, 2013
Interest Income [Member]
WebBank [Member]
Jun. 30, 2012
Interest Income [Member]
WebBank [Member]
Jun. 30, 2013
Interest Income [Member]
WebBank [Member]
Jun. 30, 2012
Interest Income [Member]
WebBank [Member]
Jun. 30, 2013
Steel Excel [Member]
Percentage Owned By Steel Partners [Member]
Equity Method Investment, Ownership Percentage (as a percent)                       52.40%
Related Party Transaction, Expenses from Transactions with Related Party $ 900,000 $ 300,000 $ 1,900,000 $ 500,000 $ 35,000 $ 300,000            
Accounts Payable, Related Parties 400,000   400,000                  
Due from Related Parties, Current             15,100,000          
Revenue from Related Parties               $ 22,997 $ 25,726 $ 47,676 $ 25,726