Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Intangible Assets and Goodwill
Intangible Assets, gross	$ 107,532		$ 107,532		$ 24,523
Accumulated Amortization	(15,882)		(15,882)		(8,562)
Intangible Assets, Net	91,650		91,650		$ 15,961
Aggregate amortization expense	2,983	$ 672	7,043	$ 2,141
Insurance licenses
Intangible Assets and Goodwill
Intangible Assets, gross	4,960		4,960
Intangible Assets, Net	4,960		$ 4,960
Customer relationships
Intangible Assets and Goodwill
Weighted Average Useful Life (in years)			9 years		7 years
Intangible Assets, gross	48,590		$ 48,590		$ 8,440
Accumulated Amortization	(5,006)		(5,006)		(2,173)
Intangible Assets, Net	43,584		$ 43,584		$ 6,267
Acquired technology
Intangible Assets and Goodwill
Weighted Average Useful Life (in years)			6 years		6 years
Intangible Assets, gross	19,565		$ 19,565		$ 12,170
Accumulated Amortization	(8,008)		(8,008)		(5,481)
Intangible Assets, Net	11,557		$ 11,557		$ 6,689
Trademarks and tradenames
Intangible Assets and Goodwill
Weighted Average Useful Life (in years)			9 years		9 years
Intangible Assets, gross	23,873		$ 23,873		$ 3,688
Accumulated Amortization	(2,009)		(2,009)		(893)
Intangible Assets, Net	21,864		$ 21,864		$ 2,795
Non-competition agreements
Intangible Assets and Goodwill
Weighted Average Useful Life (in years)			2 years		2 years
Intangible Assets, gross	410		$ 410		$ 225
Accumulated Amortization	(179)		(179)		(15)
Intangible Assets, Net	231		$ 231		$ 210
Value of business acquired
Intangible Assets and Goodwill
Weighted Average Useful Life (in years)			1 year
Intangible Assets, gross	400		$ 400
Accumulated Amortization	(194)		(194)
Intangible Assets, Net	206		$ 206
Renewal rights
Intangible Assets and Goodwill
Weighted Average Useful Life (in years)			8 years
Intangible Assets, gross	9,734		$ 9,734
Accumulated Amortization	(486)		(486)
Intangible Assets, Net	$ 9,248		$ 9,248