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Note G - Note Receivable - Related Party (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 2 Months Ended 10 Months Ended 11 Months Ended 21 Months Ended 34 Months Ended 36 Months Ended 54 Months Ended
Jul. 12, 2010
Mar. 31, 2012
May 31, 2011
Mar. 31, 2009
May 03, 2010
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2011
Jun. 25, 2007
Notes Receivable, Related Parties, Noncurrent (in Dollars)   $ 3,522       $ 3,522 $ 4,090 $ 3,907 $ 3,000
Related Party Transaction, Rate       8.00%   6.00%      
Interest Income Related Party (in Dollars)             1,090    
Related Party Shares Pledged As Collateral 765,000 315,000 210,000   510,000        
Shares Released Related Party Transaction 555,000                
Market Value Shares Pledged As Collateral Related Party (in Dollars) $ 6,798 $ 13,466       $ 13,466      
Stock Split A (Member)
                  
Stock Split Conversion Ratio         three-for-two        
Stock Split B (Member)
                  
Stock Split Conversion Ratio     three-for-two