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CONSOLIDATED STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Mar. 31, 2012 | Mar. 31, 2011
--- | --- | ---
Investments at market or fair value |  |
Companies more than 25% owned, Cost | $ 14,870 | $ 25,521
Companies 5% to 25% owned, Cost | 14,003 | 14,049
Companies less than 5% owned, Cost | 60,120 | 58,784
Total investments, Cost | $ 88,993 | $ 98,354
Net Assets |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, authorized (in shares) | 5,000,000 | 5,000,000
Common stock, issued (in shares) | 4,339,416 | 4,337,916
Treasury stock, at cost (in shares) | 584,878 | 584,878
Net asset value per share (in shares) | 3,754,538 | 3,753,038

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