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Borrowings - Holdings Credit Facility (Details) - USD ($) $ in Thousands		7 Months Ended	12 Months Ended					35 Months Ended
	Apr. 20, 2021	Apr. 19, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Sep. 29, 2020	Jun. 09, 2018	Jun. 08, 2018	Nov. 05, 2014
Line of Credit Facility [Line Items]
Minimum asset coverage ratio									150.00%	200.00%	150.00%
Amortization of financing costs			$ 6,837	$ 7,388	$ 4,935
Revolving Credit Facility | Holdings Credit Facility
Line of Credit Facility [Line Items]
Credit facility outstanding balance			618,963	545,263	450,163
Revolving Credit Facility | Holdings Credit Facility | Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 800
Available borrowing capacity			$ 730,000
Borrowing capacity, first percentage			25.00%
Borrowing capacity, second percentage			45.00%
Borrowing capacity, third percentage			67.50%
Borrowing capacity, fourth percentage			70.00%
Minimum asset coverage ratio			150.00%
Interest expense			$ 22,542	10,210	14,164
Non-usage fee			743	1,282	1,304
Amortization of financing costs			$ 2,956	$ 2,852	$ 1,507
Weighted average interest rate			3.90%	2.10%	2.70%
Effective interest rate			4.50%	3.00%	3.20%
Average debt outstanding			$ 581,367	$ 478,016	$ 526,645	$ 598,129	$ 384,433
Revolving Credit Facility | Holdings Credit Facility, Broadly Syndicated Loans | Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Interest rate margin	1.60%	2.00%						1.75%
Revolving Credit Facility | Holdings Credit Facility, Excluding Broadly Syndicated Loans | Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Interest rate margin	2.10%	2.50%						2.25%

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of the fee for available but unused credit capacity under the credit facility.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Average amount outstanding of long-term debt.

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