INVESTMENTS - Industry Composition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Sep. 30, 2025
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 3,094,065	$ 4,479,835
CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	219,644
Canada | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	7,869
France | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	18,953
Germany | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	9,435
Netherlands | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	2,610
United Kingdom | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	4,950
USA | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 175,827
Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	100.00%
Fair Value | Industry Concentration Risk | Canada | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	4.00%
Fair Value | Industry Concentration Risk | France | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	9.00%
Fair Value | Industry Concentration Risk | Germany | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	4.00%
Fair Value | Industry Concentration Risk | Netherlands | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	1.00%
Fair Value | Industry Concentration Risk | United Kingdom | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	2.00%
Fair Value | Industry Concentration Risk | USA | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	80.00%
Aerospace & Defense | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 24,511
Aerospace & Defense | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	11.00%
Automotive | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 4,859
Automotive | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	2.00%
Banking, Finance, Insurance, & Real Estate | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 3,435
Banking, Finance, Insurance, & Real Estate | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	2.00%
Capital Equipment | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 13,720
Capital Equipment | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	6.00%
Chemicals, Plastics, & Rubber | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 2,406
Chemicals, Plastics, & Rubber | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	1.00%
Consumer Goods: Durable | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 2,743
Consumer Goods: Durable | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	1.00%
Consumer Goods: Non-durable | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 4,908
Consumer Goods: Non-durable | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	2.00%
Energy: Electricity | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 4,843
Energy: Electricity | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	2.00%
Healthcare & Pharmaceuticals | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 26,273
Healthcare & Pharmaceuticals | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	12.00%
High Tech Industries | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 45,832
High Tech Industries | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	21.00%
Media: Advertising, Printing, & Publishing | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 10,162
Media: Advertising, Printing, & Publishing | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	5.00%
Media: Diversified & Production | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 5,700
Media: Diversified & Production | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	3.00%
Services: Business | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 54,007
Services: Business | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	25.00%
Services: Consumer | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 9,405
Services: Consumer | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	4.00%
Transportation: Cargo | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 2,959
Transportation: Cargo | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	1.00%
Utilities: Electric | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Total investments at fair value	$ 3,881
Utilities: Electric | Fair Value | Industry Concentration Risk | CPCF BPCC LLC
Schedule of Equity Method Investments [Line Items]
Percentage of Total Portfolio	2.00%