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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Investment income:      
Interest $ 1,980 $ 1,364 $ 1,045
Dividends 6,720 5,432 3,789
Management and directors' fees 634 772 1,275
Revenues total 9,334 7,568 6,109
Operating expenses:      
Salaries 3,653 3,089 2,164
Stock option expense 1,050 957 675
Net pension benefit (300) (291) (369)
Professional fees 990 819 551
Other operating expenses 1,279 1,064 882
Total operating expenses 6,672 5,638 3,903
Income before income taxes 2,662 1,930 2,206
Income tax expense 118 126 115
Net investment income 2,544 1,804 2,091
Proceeds from disposition of investments 32,454 77,750 5,191
Cost of investments sold 20,627 14,287 3,550
Realized gain on investments before income tax 11,827 63,463 1,640
Income tax expense 1,249 24,578 815
Net realized gain on investments 10,578 38,885 826
Net increase in unrealized appreciation of investments 78,635 12,999 70,624
Net realized and unrealized gain on investments 89,213 51,884 71,450
Increase in net assets from operations $ 91,757 $ 53,688 $ 73,541