Goodwill and Intangible Assets, net - Summary of Finite-Lived Intangible Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)	23 years
At inception:	$ 174,476
Accumulated amortization and impairments:	(26,780)
Total	$ 147,696
Value of business acquired
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)	30 years
At inception:	$ 94,419
Accumulated amortization and impairments:	$ (10,835)
Value of distribution acquired
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)	17 years
At inception:	$ 53,996
Accumulated amortization and impairments:	$ (8,684)
Value of agency relationships
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)	14 years
At inception:	$ 16,981
Accumulated amortization and impairments:	$ (4,059)
Value of customer relationships
Finite-Lived Intangible Assets [Line Items]
Useful life (in years)	10 years
At inception:	$ 9,080
Accumulated amortization and impairments:	$ (3,202)