CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Increase in net assets from operations	$ 106,707,000	$ 91,757,000	$ 53,688,000
Adjustments to reconcile increase in net assets from operations to net cash provided by operating activities:
Net proceeds from disposition of investments	99,535,000	32,454,000	71,133,000
Return of Capital on Investment	767,000	0	0
Proceeds from repayment of loans	0	2,111,000	4,519,000
Purchases of securities	(10,018,000)	(13,377,000)	(10,520,000)
Depreciation and amortization	30,000	25,000	27,000
Net pension benefit	(34,000)	(300,000)	(291,000)
Realized gains on investments before income tax	(89,557,814)	(11,826,876)	(63,462,583)
Taxes payable on behalf of shareholders on deemed distribution	1,125,000	1,249,000	24,577,000
Net increase in unrealized appreciation of investments	(16,367,000)	(78,635,000)	(12,999,000)
Stock option and restricted awards expense	515,000	1,050,000	957,000
(Increase) decrease in dividend and interest receivable	(724,000)	(1,218,000)	490,000
(Increase) decrease in receivables from affiliates	(70,000)	120,000	525,000
(Increase) decrease in other assets	6,000	(81,000)	(18,000)
Increase (decrease) in other liabilities	2,520,000	344,000	(496,000)
(Decrease) increase in deferred income taxes	(92,000)	(123,000)	102,000
Net cash provided by operating activities	94,342,000	23,549,000	68,231,000
Cash flows from financing activities
Distributions from undistributed net investment income	(3,025,000)	(3,003,000)	(2,994,000)
Dividends paid from capital gains	(77,301,000)	0	0
Proceeds from exercise of employee stock options	3,981,000	99,000	745,000
Payment of federal income tax for deemed capital gains distribution	(1,125,000)	(1,249,000)	(24,577,000)
Net cash used in financing activities	(77,470,000)	(4,153,000)	(26,826,000)
Net increase in cash and cash equivalents	16,872,000	19,396,000	41,405,000
Cash and cash equivalents at beginning of period	64,895,000	45,499,000	4,094,000
Cash and cash equivalents at end of period	81,767,000	64,895,000	45,499,000
Supplemental disclosure of cash flow information:
Income taxes	590,000	0	0
Other non-cash transactions:
Total Investments	$ 4,000,000	$ 1,000,000	$ 6,617,000