Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Narrative (Details)

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Fair Value Measurements - Narrative (Details)
$ in Thousands, £ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2024
USD ($)
Mar. 31, 2024
GBP (£)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2023
GBP (£)
Oct. 31, 2021
USD ($)
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]              
Payments of contingent consideration     $ 8,168 $ 4,041      
Aidvantage              
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]              
Contingent consideration $ 2,800   $ 2,800   $ 7,500    
BZ Bodies Limited              
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]              
Contingent consideration         $ 2,500 £ 2.0  
Payments of contingent consideration $ 2,500 £ 2.0          
Maximum | Navient              
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]              
Contingent consideration             $ 65,000