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Schedule of Investments in and Advances to Affiliates | 12 Months Ended
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Mar. 31, 2013
Schedule of Investments in and Advances to Affiliates [Abstract] |
Schedule of Investments in and Advances to Affiliates | SCHEDULE 12-14 Schedule of Investments in and Advances to Affiliates (In thousands)
Portfolio Company / Type of Investment (1) |  | Amount of Interest, Fees or Dividends Credited in Income (2) |  |  | Fair Value at March 31, 2012 |  |  | Gross Additions (3) |  |  | Gross Reductions (4) |  |  | Fair Value at March 31, 2013 |
Control Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
The RectorSeal Corporation 27,907 shares common stock |  | $ | 5,915 |  |  | $ | 166,300 |  |  | $ | 72,600 |  |  |  | − |  |  | $ | 238,900 |
The Whitmore Manufacturing Company 80 shares common stock |  |  | 1,509 |  |  |  | 67,200 |  |  |  | 13,300 |  |  |  | − |  |  |  | 80,500 |
Heelys, Inc. 9,317,310 shares common stock |  |  | − |  |  |  | 20,498 |  |  |  | − |  |  |  | 20,498 |  |  |  | − |
Media Recovery, Inc. 800,000 shares Series A Convertible Preferred Stock, convertible into 800,000 shares common stock |  |  | − |  |  |  | 3,100 |  |  |  | − |  |  |  | 1,100 |  |  |  | 2,000 |
4,000,002 shares common stock |  |  | − |  |  |  | 15,600 |  |  |  | − |  |  |  | 5,700 |  |  |  | 9,900 |
Balco, Inc. 445,000 shares common stock; 60,920 shares Class B non-voting common |  |  | − |  |  |  | 4,100 |  |  |  | 400 |  |  |  | − |  |  |  | 4,500 |
CapStar Holdings Corporation 500 shares common stock; |  |  | − |  |  |  | 5,338 |  |  |  | 840 |  |  |  | − |  |  |  | 6,178 |
1,000,000 shares preferred stock |  |  | − |  |  |  | − |  |  |  | 1,668 |  |  |  | − |  |  |  | 1,668 |
Discovery Alliance, LLC 90.0% limited liability company |  |  | − |  |  |  | 1,280 |  |  |  | − |  |  |  | 324 |  |  |  | 956 |
Humac Company 1,041,000 shares of common stock |  |  | 5 |  |  |  | 159 |  |  |  | 29 |  |  |  | - |  |  |  | 188 |
Total Control Investments |  | $ | 7,429 |  |  | $ | 283,575 |  |  | $ | 88,837 |  |  | $ | 27,622 |  |  | $ | 344,790 |
Portfolio Company / Type of Investment (1) |  | Amount of Interest, Fees or Dividends Credited in Income (2) |  |  | Fair Value at March 31, 2012 |  |  | Gross Additions (3) |  |  | Gross Reductions (4) |  |  | Fair Value at March 31, 2013 |
Affiliated Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Alamo Group, Inc. 2,830,300 shares common stock |  | $ | 764 |  |  |  | 85,139 |  |  |  | 23,139 |  |  |  |  |  |  | 108,278 |
Encore Wire Corporation 1,312,500 shares of common stock |  |  | 172 |  |  |  | 121,458 |  |  |  | − |  |  |  | 75,507 |  |  |  | 45,951 |
PalletOne, Inc. 12.3% Senior Subordinated Notes, $2,000,000 due 2015 |  |  | 250 |  |  |  | 2,000 |  |  |  | − |  |  |  | 100 |  |  |  | 1,900 |
150,000 shares of common stock |  |  | − |  |  |  | − |  |  |  | − |  |  |  | − |  |  |  | − |
Warrant to purchase 15,294 shares of common stock at $1,00 per share, expiring 2011 |  |  | − |  |  |  | − |  |  |  | − |  |  |  | − |  |  |  | − |
Boxx Technologies, Inc. 3,125,354 shares Series B Convertible Preferred Stock, convertible into 3,125,354 shares of common stock at $0.50 per share |  |  | − |  |  |  | 600 |  |  |  | 640 |  |  |  | − |  |  |  | 1,240 |
Wellogix, Inc. 4,788,371 shares Series A-1 Convertible Preferred Stock, convertible into 4,788,371 shares of common stock at $1.0441 per share |  |  | − |  |  |  | 25 |  |  |  | − |  |  |  | − |  |  |  | 25 |
Total Affiliated Investments |  | $ | 1,186 |  |  | $ | 209,222 |  |  | $ | 23,779 |  |  | $ | 75,607 |  |  | $ | 157,394 |
Total Control & Affiliated Investments |  | $ | 8,615 |  |  | $ | 492,797 |  |  | $ | 112,616 |  |  | $ | 103,229 |  |  | $ | 502,184 |
This schedule should be read in conjunction with our Consolidated Financial Statements, including the Consolidated Schedules of Investments and Notes to Consolidated Financial Statements.
(1) | The principal amount and ownership detail as shown in the Consolidated Schedules of Investments.
(2) | Represents the total amount of interest, fees and dividends, credited to income for the portion of the year an investment was included in the Control or Non-Control/Non-Affiliate categories, respectively.
(3) | Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in unrealized depreciation as well as movement of an existing portfolio company into this category and out of a different category.
(4) | Gross reductions included in decreases in the cost basis of investment resulting from principal payments or sales and exchanges of one or more existing securities for one or more new securities. Gross reductions also include net increases in unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category.

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- Definition The entire disclosure for the information summarizing investments in and advances to majority-owned subsidiaries, other controlled companies, and other affiliates. It reflects specified information about ownership, financial results from, and financial position in such entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Article 12 + Details
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