Goodwill and Intangible Assets, net - Summary of Finite-Lived Intangible Assets (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
At inception	$ 174,476
Accumulated amortization	(19,720)
Total	$ 154,756
Weighted Average useful Life (in Years)	23 years
Business acquired
Finite-Lived Intangible Assets [Line Items]
At inception	$ 94,419
Accumulated amortization	$ (9,113)
Weighted Average useful Life (in Years)	30 years
Distribution acquired
Finite-Lived Intangible Assets [Line Items]
At inception	$ 53,996
Accumulated amortization	$ (4,355)
Weighted Average useful Life (in Years)	17 years
Agency relationships
Finite-Lived Intangible Assets [Line Items]
At inception	$ 16,981
Accumulated amortization	$ (3,417)
Weighted Average useful Life (in Years)	14 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
At inception	$ 9,080
Accumulated amortization	$ (2,835)
Weighted Average useful Life (in Years)	10 years