Goodwill and Intangible Assets, net - Summary of Finite-Lived Intangible Assets (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
At inception	$ 174,476
Accumulated amortization	(4,862)
Total	169,614
Business acquired
Finite-Lived Intangible Assets [Line Items]
At inception	94,419
Accumulated amortization	$ (1,844)
Business acquired | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (in Years)	35 years
Business acquired | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (in Years)	17 years
Distribution acquired
Finite-Lived Intangible Assets [Line Items]
At inception	$ 53,996
Accumulated amortization	$ (973)
Distribution acquired | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (in Years)	17 years
Distribution acquired | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (in Years)	16 years
Agency relationships
Finite-Lived Intangible Assets [Line Items]
At inception	$ 16,981
Accumulated amortization	$ (745)
Useful Life (in Years)	14 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
At inception	$ 9,080
Accumulated amortization	$ (1,300)
Useful Life (in Years)	10 years