Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net - Summary of Intangible Assets (Detail)

v3.21.2
Intangible Assets, Net - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Indefinite-lived Intangible Assets [Line Items]    
Total non-amortizing intangibles $ 178,000 $ 5,422
Amortizing Intangibles, Cost 539,700 23,681
Accumulated Amortization (13,457) (12,172)
Amortizing Intangibles, Net 526,243 11,509
Total intangibles, Cost 717,700 29,103
Total intangibles, Net $ 704,243 16,931
Customer Lists [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortizing Intangibles, Cost   12,754
Accumulated Amortization   (5,100)
Amortizing Intangibles, Net   $ 7,654
Customer Lists [Member] | Maximum [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 12 years  
Customer Lists [Member] | Minimum [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 5 years  
Broker/customer relationships [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years)   10 years
Amortizing Intangibles, Cost $ 530,900 $ 7,627
Accumulated Amortization (13,237) (5,429)
Amortizing Intangibles, Net $ 517,663 2,198
Broker/customer relationships [Member] | Maximum [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 15 years  
Broker/customer relationships [Member] | Minimum [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 8 years  
Trade names [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 10 years  
Amortizing Intangibles, Cost $ 8,800 2,495
Accumulated Amortization (220) (1,487)
Amortizing Intangibles, Net $ 8,580 $ 1,008
Trade names [Member] | Maximum [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 20 years  
Trade names [Member] | Minimum [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years) 5 years  
Technology assets [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Amortization Period (Years)   5 years
Amortizing Intangibles, Cost   $ 805
Accumulated Amortization   (156)
Amortizing Intangibles, Net   649
Trade names [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Total non-amortizing intangibles $ 178,000 $ 5,422