Quarterly report pursuant to Section 13 or 15(d)

Business Combinations - Narrative (Details)

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Business Combinations - Narrative (Details)
$ in Thousands, £ in Millions
3 Months Ended
Dec. 31, 2021
USD ($)
Oct. 06, 2021
USD ($)
Sep. 30, 2021
USD ($)
Sep. 14, 2021
USD ($)
Sep. 14, 2021
GBP (£)
May 28, 2021
USD ($)
asset
Dec. 31, 2021
USD ($)
Business Acquisition [Line Items]              
Number of intangible assets acquired | asset           3  
Goodwill $ 1,776,239   $ 1,774,406       $ 1,776,239
VES Group, Inc.              
Business Acquisition [Line Items]              
Percentage of voting equity interests acquired           100.00%  
Cash consideration paid, net of cash acquired 1,360,231   1,360,231     $ 1,360,000  
Liabilities arising from contingencies 12,000         12,000 12,000
Indemnification assets           6,000  
Liability for uncertainty in income taxes           12,300  
Goodwill 865,268   864,176       865,268
Intangible assets $ 664,000   $ 664,000       664,000
VES Group, Inc. | Indemnification Asset On Uncertain Tax Positions              
Business Acquisition [Line Items]              
Indemnification assets           $ 7,200  
Connect Assist              
Business Acquisition [Line Items]              
Percentage of voting equity interests acquired       100.00%      
Cash payment to acquire business       $ 21,100 £ 15.5    
Goodwill       11,300      
Intangible assets       $ 7,700      
Revenue contributed from acquired business             5,800
Gross profit contributed from acquired business             2,200
Navient              
Business Acquisition [Line Items]              
Intangible assets   $ 14,900          
Revenue contributed from acquired business             34,700
Gross profit contributed from acquired business             $ 2,000
Contingent consideration   $ 15,300          
Amortization period   27 months          
Navient | Maximum              
Business Acquisition [Line Items]              
Contingent consideration   $ 65,000