Annual report pursuant to Section 13 and 15(d)

Fair Value - Assets and Liabilities (Details)

v3.21.2
Fair Value - Assets and Liabilities (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Financial information for each of the Company's business segments      
Debt fair value $ 1,510,000 $ 28,900  
Fair Value, Recurring      
Financial information for each of the Company's business segments      
Total assets 28,516    
Contingent consideration 270    
Total liabilities 680    
Fair Value, Recurring | Deferred compensation assets - Rabbi Trust      
Financial information for each of the Company's business segments      
Total assets 28,516    
Fair Value, Recurring | Interest Rate Swap      
Financial information for each of the Company's business segments      
Interest rate swap 410    
Level 1 | Fair Value, Recurring      
Financial information for each of the Company's business segments      
Total assets 28,516    
Contingent consideration 0    
Total liabilities 0    
Level 1 | Fair Value, Recurring | Deferred compensation assets - Rabbi Trust      
Financial information for each of the Company's business segments      
Total assets 28,516    
Level 1 | Fair Value, Recurring | Interest Rate Swap      
Financial information for each of the Company's business segments      
Interest rate swap 0    
Level 2 | Fair Value, Recurring      
Financial information for each of the Company's business segments      
Total assets 0    
Contingent consideration 0    
Total liabilities 410    
Level 2 | Fair Value, Recurring | Deferred compensation assets - Rabbi Trust      
Financial information for each of the Company's business segments      
Total assets 0    
Level 2 | Fair Value, Recurring | Interest Rate Swap      
Financial information for each of the Company's business segments      
Interest rate swap 410    
Level 3 | Fair Value, Recurring      
Financial information for each of the Company's business segments      
Total assets 0    
Contingent consideration 270    
Total liabilities 270    
Level 3 | Fair Value, Recurring | Deferred compensation assets - Rabbi Trust      
Financial information for each of the Company's business segments      
Total assets 0    
Level 3 | Fair Value, Recurring | Interest Rate Swap      
Financial information for each of the Company's business segments      
Interest rate swap 0    
U.S. Services      
Financial information for each of the Company's business segments      
Impairment of long-lived assets held-for-use $ 12,500 $ 1,200 $ 3,700