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Summary of Significant Accounting Policies (Property, Equipment and Improvements, Net) (Details)
Sep. 30, 2025
Furniture and fixtures, purchases software and other equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Property, equipment and improvements depreciation life 3 years
Furniture and fixtures, purchases software and other equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Property, equipment and improvements depreciation life 10 years
Building Improvements and buildings | Minimum  
Property, Plant and Equipment [Line Items]  
Property, equipment and improvements depreciation life 10 years
Building Improvements and buildings | Maximum  
Property, Plant and Equipment [Line Items]  
Property, equipment and improvements depreciation life 39 years