Quarterly report pursuant to Section 13 or 15(d)

Business combinations - Narrative (Details)

v3.21.2
Business combinations - Narrative (Details)
$ in Thousands, $ in Millions, ₩ in Billions
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2021
USD ($)
May 28, 2021
USD ($)
Mar. 31, 2021
USD ($)
Mar. 01, 2021
USD ($)
Aug. 21, 2020
USD ($)
Aug. 21, 2020
KRW (₩)
Feb. 28, 2020
USD ($)
Feb. 28, 2020
AUD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Aug. 21, 2020
KRW (₩)
Feb. 28, 2020
AUD ($)
Business Acquisition [Line Items]                                
Amortization of intangible assets                   $ 12,132 $ 8,712 $ 23,718 $ 26,734      
Revenue                   1,243,520 901,337 3,148,354 2,537,701      
Gross profit                   291,856 $ 185,603 728,569 $ 514,151      
Acquisition-related expenses                       8,800        
Goodwill $ 1,757,795               $ 1,757,795 1,757,795   $ 1,757,795   $ 593,129    
Weighted Average                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life                       11 years 2 months 12 days        
Weighted Average | Customer contracts and relationships                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life       11 years 2 months 12 days                        
Weighted Average | Technology-based intangible assets                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life                       13 years 8 months 12 days        
Weighted Average | Provider network                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life                       11 years 10 months 24 days        
VES Group, Inc.                                
Business Acquisition [Line Items]                                
Percentage of voting equity interests acquired   100.00%                            
Estimated cash consideration, net of cash acquired   $ 1,367,725                            
Liabilities arising from contingencies   12,000                            
Indemnification assets   6,000                            
Indemnification assets, range of outcomes, value, low   6,000                            
Indemnification assets, range of outcomes, value, high   12,000                            
Liability for uncertainty in income taxes   11,800                            
Revenue contributed from acquired business                 45,800              
Gross profit contributed from acquired business                 19,500              
Amortization of intangible assets                 4,600              
Acquisition-related expenses                       $ 52,200        
Goodwill   857,274                            
Intangible assets   664,000                            
VES Group, Inc. | Indemnification Asset On Uncertain Tax Positions                                
Business Acquisition [Line Items]                                
Indemnification assets   $ 6,700                            
VES Group, Inc. | Customer contracts and relationships                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life   12 years                            
VES Group, Inc. | Technology-based intangible assets                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life   14 years                            
Attain                                
Business Acquisition [Line Items]                                
Estimated cash consideration, net of cash acquired 419,097   $ 419,864 $ 419,100                        
Revenue                   56,400   74,800        
Gross profit                   13,200   17,100        
Acquisition-related expenses                       300        
Goodwill 304,026   303,465           304,026 304,026   304,026        
Intangible assets $ 105,000   $ 105,000           $ 105,000 105,000   $ 105,000        
Attain | Customer Relationships                                
Business Acquisition [Line Items]                                
Estimated Straight-Line Useful Life       10 years                        
InjuryNet                                
Business Acquisition [Line Items]                                
Percentage of voting equity interests acquired             100.00%                 100.00%
Cash payment to acquire business             $ 4,400 $ 6.7                
Contingent consideration             2,100                 $ 3.1
Goodwill             2,600                  
Intangible assets             $ 900                  
Index Root                                
Business Acquisition [Line Items]                                
Percentage of voting equity interests acquired         100.00%                   100.00%  
Cash payment to acquire business         $ 5,400 ₩ 6.3                    
Contingent consideration         900                   ₩ 1.1  
Goodwill         4,600                      
Intangible assets         $ 1,400                      
Reversal of acquisition related costs                   $ 1,000