SUBSEQUENT EVENTS	9 Months Ended
Sep. 30, 2026
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Company’s management has evaluated subsequent events through the date of issuance of the consolidated financial statements, and identified the following to report: In October 2026, Main Street issued $500.0 million in aggregate principal amount of 6.55% unsecured notes due January 15, 2030 (the “January 2030 Notes”) at an issue price of 99.258%. The January 2030 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. In November 2026, Main Street declared a supplemental dividend of $0.30 per share payable in December 2026. This supplemental dividend is in addition to the previously announced regular monthly dividends that Main Street declared of $0.265 per share for each month of October, November and December 2026, or total regular monthly dividends of $0.795 per share for the fourth quarter of 2026, resulting in total dividends declared for the fourth quarter of 2026 of $1.095 per share. In November 2026, Main Street also declared regular monthly dividends of $0.27 per share for each month of January, February and March of 2027. These regular monthly dividends equal a total of $0.81 per share for the first quarter of 2027, representing a 3.8% increase from the regular monthly dividends paid in the first quarter of 2026. Including the regular monthly and supplemental dividends declared through the first quarter of 2027, Main Street will have paid $52.315 per share in cumulative dividends since its October 2007 initial public offering.

The Company’s management has evaluated subsequent events through the date of issuance of the consolidated financial statements, and identified the following to report:

In October 2026, Main Street issued $500.0 million in aggregate principal amount of 6.55% unsecured notes due January 15, 2030 (the “January 2030 Notes”) at an issue price of 99.258%. The January 2030 Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions.

In November 2026, Main Street declared a supplemental dividend of $0.30 per share payable in December 2026. This supplemental dividend is in addition to the previously announced regular monthly dividends that Main Street declared of $0.265 per share for each month of October, November and December 2026, or total regular monthly dividends of $0.795 per share for the fourth quarter of 2026, resulting in total dividends declared for the fourth quarter of 2026 of $1.095 per share.

In November 2026, Main Street also declared regular monthly dividends of $0.27 per share for each month of January, February and March of 2027. These regular monthly dividends equal a total of $0.81 per share for the first quarter of 2027, representing a 3.8% increase from the regular monthly dividends paid in the first quarter of 2026. Including the regular monthly and supplemental dividends declared through the first quarter of 2027, Main Street will have paid $52.315 per share in cumulative dividends since its October 2007 initial public offering.