Quarterly report pursuant to Section 13 or 15(d)

Business combinations - Schedule of Asset Acquired and Liabilities Assumed, VES (Details)

v3.21.2
Business combinations - Schedule of Asset Acquired and Liabilities Assumed, VES (Details) - USD ($)
$ in Thousands
 9 Months Ended
May 28, 2021
Jun. 30, 2021
Jun. 30, 2020
Sep. 30, 2020
Business Acquisition [Line Items]        
Cash consideration paid, net of cash acquired   $ 1,779,473 $ 2,611  
Goodwill   $ 1,757,795   $ 593,129
VES Group, Inc.        
Business Acquisition [Line Items]        
Cash consideration paid, net of cash acquired $ 1,360,231      
Estimated additional cash payments 7,494      
Estimated cash consideration, net of cash acquired 1,367,725      
Accounts receivable - billed, billable and unbilled 44,078      
Prepaid expenses and other current assets 13,911      
Property and equipment, net 9,113      
Operating lease right-of-use assets 18,898      
Intangible assets 664,000      
Other assets 12,816      
Total identifiable assets acquired 762,816      
Accounts payable and other liabilities 42,978      
Operating lease liabilities, less current portion 18,898      
Income taxes payable 6,196      
Deferred income taxes 177,626      
Other long-term liabilities 6,667      
Net identifiable assets acquired 510,451      
Goodwill 857,274      
Net assets acquired $ 1,367,725