Investments - Industry Composition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 3,094,065	$ 2,458,929
CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	219,644	212,256
CPCF BPCC LLC | Canada
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	7,869	9,959
CPCF BPCC LLC | France
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	18,953	21,122
CPCF BPCC LLC | Germany
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	9,435	9,945
CPCF BPCC LLC | Netherlands
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	2,610	3,043
CPCF BPCC LLC | United Kingdom
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	4,950	5,968
CPCF BPCC LLC | USA
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 175,827	$ 162,219
Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	100.00%	100.00%
Fair Value | Industry Concentration Risk | CPCF BPCC LLC | Canada
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	3.60%	4.70%
Fair Value | Industry Concentration Risk | CPCF BPCC LLC | France
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	8.60%	10.00%
Fair Value | Industry Concentration Risk | CPCF BPCC LLC | Germany
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	4.30%	4.70%
Fair Value | Industry Concentration Risk | CPCF BPCC LLC | Netherlands
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	1.20%	1.40%
Fair Value | Industry Concentration Risk | CPCF BPCC LLC | United Kingdom
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	2.30%	2.80%
Fair Value | Industry Concentration Risk | CPCF BPCC LLC | USA
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	80.00%	76.40%
Aerospace & Defense
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 118,617
Aerospace & Defense | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 24,511	$ 15,754
Aerospace & Defense | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		4.80%
Aerospace & Defense | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	11.20%	7.40%
Automotive
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 47,469
Automotive | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 4,859	$ 6,908
Automotive | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		1.90%
Automotive | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	2.20%	3.30%
Banking, Finance, Insurance, & Real Estate
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 401,512
Banking, Finance, Insurance, & Real Estate | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 3,435	$ 12,729
Banking, Finance, Insurance, & Real Estate | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		16.30%
Banking, Finance, Insurance, & Real Estate | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	1.60%	6.00%
Capital Equipment
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 72,457
Capital Equipment | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 13,720	$ 22,834
Capital Equipment | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		3.00%
Capital Equipment | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	6.20%	10.80%
Chemicals, Plastics, & Rubber
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 27,798
Chemicals, Plastics, & Rubber | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 2,406	$ 2,961
Chemicals, Plastics, & Rubber | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		1.10%
Chemicals, Plastics, & Rubber | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	1.10%	1.40%
Consumer Goods: Durable
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 53,766
Consumer Goods: Durable | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 2,743	$ 2,962
Consumer Goods: Durable | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		2.20%
Consumer Goods: Durable | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	1.20%	1.40%
Consumer Goods: Non-durable
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 37,547
Consumer Goods: Non-durable | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 4,908	$ 0
Consumer Goods: Non-durable | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		1.50%
Consumer Goods: Non-durable | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	2.20%	0.00%
Energy: Electricity
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 8,389
Energy: Electricity | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 4,843	$ 4,962
Energy: Electricity | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		0.30%
Energy: Electricity | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	2.20%	2.30%
Healthcare & Pharmaceuticals | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 26,273	$ 24,572
Healthcare & Pharmaceuticals | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	12.00%	11.60%
High Tech Industries
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 372,585
High Tech Industries | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 45,832	$ 40,316
High Tech Industries | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		15.20%
High Tech Industries | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	20.90%	19.00%
Media: Advertising, Printing & Publishing
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 27,801
Media: Advertising, Printing & Publishing | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 10,162	$ 6,478
Media: Advertising, Printing & Publishing | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		1.10%
Media: Advertising, Printing & Publishing | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	4.60%	3.10%
Media: Diversified and Production
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 58,154
Media: Diversified and Production | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 5,700	$ 5,806
Media: Diversified and Production | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		2.40%
Media: Diversified and Production | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	2.60%	2.70%
Services: Business
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 390,046
Services: Business | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 54,007	$ 44,317
Services: Business | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		15.90%
Services: Business | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	24.60%	20.80%
Services: Consumer
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 127,976
Services: Consumer | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 9,405	$ 9,892
Services: Consumer | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		5.20%
Services: Consumer | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	4.30%	4.70%
Transportation: Cargo
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 150,066
Transportation: Cargo | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 2,959	$ 2,911
Transportation: Cargo | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		6.10%
Transportation: Cargo | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	1.30%	1.40%
Transportation: Consumer
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 49,022
Transportation: Consumer | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 0	$ 4,951
Transportation: Consumer | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		2.00%
Transportation: Consumer | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	0.00%	2.30%
Utilities: Electric
Schedule of Equity Method Investments [Line Items]
Total investments at fair value		$ 11,743
Utilities: Electric | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 3,881	$ 3,903
Utilities: Electric | Fair Value | Industry Concentration Risk
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio		0.50%
Utilities: Electric | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percent of Total Portfolio	1.80%	1.80%