MIDDLE MARKET CREDIT FUND, LLC - Summarized Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022		Mar. 31, 2022	Dec. 31, 2021
ASSETS
Investments, at fair value	$ 1,896,420	[1]		$ 1,896,420	[1]			$ 1,979,877	[2]
Cash, cash equivalents and restricted cash	54,150		$ 39,291	54,150		$ 39,291		30,506			$ 93,074
Total assets	1,982,597			1,982,597				2,041,697
LIABILITIES AND MEMBERS’ EQUITY
Secured borrowings	400,241		443,395	400,241		443,395	$ 455,859	440,441		$ 359,679	$ 407,655
Amortized cost	1,963,144			1,963,144				2,049,975
Selected Consolidated Statement of Operations Information:
Total investment income	60,065		44,568	118,440		92,077
Expenses:
Total expenses	32,240		22,522	63,522		44,159
Net investment income (loss)	27,175		21,870	53,745		47,389
Net realized gain (loss) on investments and non-investment assets and liabilities	(7,946)		15	(21,314)		5,486
Net change in unrealized appreciation (depreciation) on investments and non-investment assets and liabilities	(14,516)		(17,220)	269		(17,527)
Net increase (decrease) in net assets resulting from operations	4,713		4,665	32,700		35,348
Debt and equity securities | Credit Fund
ASSETS
Investments, at fair value	189,101			189,101				190,065
Credit Fund
ASSETS
Investments, at fair value	797,867			797,867				902,720
Cash, cash equivalents and restricted cash	31,504			31,504				28,030
Other assets	9,723			9,723				9,681
Total assets	839,094			839,094				940,431
LIABILITIES AND MEMBERS’ EQUITY
Secured borrowings	499,221			499,221				588,621
Other liabilities	20,462			20,462				19,940
Subordinated loans and members’ equity	319,411			319,411				331,870
Total liabilities and members’ equity	839,094			839,094				940,431
Amortized cost	853,096			853,096				953,467
Restricted cash and cash equivalents	14,694			14,694				$ 14,393
Selected Consolidated Statement of Operations Information:
Total investment income	22,491		14,807	45,445		29,486
Expenses:
Interest and credit facility expenses	10,440		5,079	20,712		9,125
Other expenses	548		600	1,001		1,097
Total expenses	10,988		5,679	21,713		10,222
Net investment income (loss)	11,503		9,128	23,732		19,264
Net realized gain (loss) on investments and non-investment assets and liabilities	(7,477)		0	(9,709)		0
Net change in unrealized appreciation (depreciation) on investments and non-investment assets and liabilities	(1,606)		(17,169)	(4,482)		(27,038)
Net increase (decrease) in net assets resulting from operations	$ 2,420		$ (8,041)	$ 9,541		$ (7,774)

[1] Fair value is determined in good faith by the Investment Adviser, as the valuation designee pursuant to Rule 2a-5 under the Investment Company Act (see Note 2, Significant Accounting Policies, and Note 3, Fair Value Measurements, to these unaudited consolidated financial statements), pursuant to the Company’s valuation policy. The fair value of all first lien and second lien debt investments, equity investments and the investment funds was determined using significant unobservable inputs.

[2] The Company has determined the indicated investments are non-qualifying assets under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying assets unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Company’s total assets.