v3.26.3
Transactions with Controlled Companies - CP Energy Services Inc. (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Investment, fair value     $ 5,944,478 [1]   $ 6,342,558 [2]
Interest Income     132,608 $ 152,394  
Interest Receivable     23,039   17,350
Spartan Energy Services, LLC | Spartan Term Loans          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Investment, fair value     $ 61,912   $ 61,429
CP Holdings of Delaware LLC | CP Energy Services Inc.          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     99.80%   99.80%
CP Energy Services Inc. | CP Well          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     100.00%   100.00%
CP Energy Services Inc. | Wright Foster Disposals, LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     100.00%   100.00%
CP Energy Services Inc. | Foster Testing Co., Inc.          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     100.00%   100.00%
CP Energy Services Inc. | ProHaul Transports, LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     100.00%   100.00%
CP Energy Services Inc. | Wright Trucking, Inc.          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     100.00%   100.00%
CP Energy Services Inc. | Wolf Energy          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest 100.00%        
Spartan Energy Holdings, Inc. | Spartan Energy Services, LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest   100.00%      
Wolf Energy Holdings, Inc. | Appalachian Energy LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest 100.00%        
Wolf Energy Holdings, Inc. | Wolf Energy, LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest 100.00%        
Wolf Energy Holdings, Inc. | Wolf Energy Services Company, LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest 100.00%        
Reportable Legal Entities | Subsidiaries | CP Holdings of Delaware LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Ownership interest     100.00%   100.00%
Reportable Legal Entities | Subsidiaries | CP Energy Services Inc.          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Interest Income     $ 5,480 5,022  
Additions     1,900 1,800  
Total Interest Income Capitalized as PIK     3,276 1,846  
Interest Receivable     463   $ 59
Other Receivables     1,110   $ 1,107
Reportable Legal Entities | Subsidiaries | CP Energy Services Inc. | CP Energy Services Inc.          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Interest Income     3,596 3,367  
Additions     1,900 400  
Total Interest Income Capitalized as PIK     2,793 867  
Reportable Legal Entities | Subsidiaries | CP Energy Services Inc. | Spartan Energy Services, LLC          
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]          
Interest Income     1,884 1,655  
Additions     0 1,400  
Total Interest Income Capitalized as PIK     $ 483 $ 979  
[1] Fair value is determined by or under the direction of our Board of Directors. Unless otherwise indicated by endnote 42 below, all of our investments are valued using significant unobservable inputs. In accordance with ASC 820, such investments are classified as Level 3 within the fair value hierarchy. See Notes 2 and 3 within the accompanying notes to consolidated financial statements for further discussion.
[2] Fair value is determined by or under the direction of our Board of Directors. Unless otherwise indicated by endnote 42 below, all of our investments are valued using significant unobservable inputs. In accordance with ASC 820, such investments are classified as Level 3 within the fair value hierarchy. See Notes 2 and 3 within the accompanying notes to consolidated financial statements for further discussion.