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Fair Value Measurements (Fair Values of Financial Instruments Measured On Recurring Basis) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Contingent consideration $ 6,400 $ 2,800
Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investment in corporate debt securities 18,534 17,788
Total assets measured at fair value 130,448 103,621
Contingent consideration 6,381 2,834
Total liabilities measured at fair value 6,381 2,834
Fair Value | Money market and other funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Money market and other funds 111,914 85,833
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investment in corporate debt securities 18,534 17,788
Total assets measured at fair value 130,448 103,621
Contingent consideration 6,381 2,834
Total liabilities measured at fair value 6,381 2,834
Carrying Value | Money market and other funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Money market and other funds 111,914 85,833
Level 1 | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investment in corporate debt securities 0 0
Total assets measured at fair value 111,914 85,833
Contingent consideration 0 0
Total liabilities measured at fair value 0 0
Level 1 | Fair Value | Money market and other funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Money market and other funds 111,914 85,833
Level 2 | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investment in corporate debt securities 0 0
Total assets measured at fair value 0 0
Contingent consideration 0 0
Total liabilities measured at fair value 0 0
Level 2 | Fair Value | Money market and other funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Money market and other funds 0 0
Level 3 | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Investment in corporate debt securities 18,534 17,788
Total assets measured at fair value 18,534 17,788
Contingent consideration 6,381 2,834
Total liabilities measured at fair value 6,381 2,834
Level 3 | Fair Value | Money market and other funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Money market and other funds $ 0 $ 0