Business Combinations and Disposals - Total consideration and the estimated fair value of the assets acquired and liabilities assumed (Details) $ in Thousands								12 Months Ended
	Oct. 27, 2021 USD ($)	Sep. 09, 2021 USD ($)	May 20, 2021 USD ($)	Apr. 05, 2021 USD ($)	Jan. 12, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jul. 23, 2020 USD ($)	Dec. 31, 2021 USD ($) item	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Intangible assets:
Goodwill						$ 28,289		$ 225,654	$ 28,289	$ 18,274	$ 21,305
Customer relationships
Intangible assets:
Weighted Average Useful Life (in years)								9 years	5 years
Acquired technology
Intangible assets:
Weighted Average Useful Life (in years)								4 years	9 years
Trademarks and tradenames
Intangible assets:
Weighted Average Useful Life (in years)								12 years	13 years
Non-competition agreements
Intangible assets:
Weighted Average Useful Life (in years)								2 years	2 years
Value of business acquired
Intangible assets:
Weighted Average Useful Life (in years)								1 year
Renewal rights
Intangible assets:
Weighted Average Useful Life (in years)								8 years
January 12, 2021 Acquisition ("V12 Data")
Purchase consideration:
Cash					$ 20,196
Holdback liabilities and amounts in escrow					150
Contingent consideration					1,400
Contingent consideration - liability-classified					1,410
Total purchase consideration:					21,756
Assets:
Cash, cash equivalents and restricted cash					1,035
Current assets					4,939
Property and equipment					996
Operating lease right-of-use assets					$ 1,383
Intangible assets:
Weighted Average Useful Life (in years)					7 years 7 months 6 days
Goodwill					$ 16,708
Total assets acquired					31,501
Current liabilities					(6,871)
Operating lease liabilities, non-current					(848)
Long-term liabilities					(2,026)
Net assets acquired					21,756
January 12, 2021 Acquisition ("V12 Data") | Customer relationships
Intangible assets:
Intangible assets, finite-lived					1,650
January 12, 2021 Acquisition ("V12 Data") | Acquired technology
Intangible assets:
Intangible assets, finite-lived					3,525
January 12, 2021 Acquisition ("V12 Data") | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived					1,225
January 12, 2021 Acquisition ("V12 Data") | Non-competition agreements
Intangible assets:
Intangible assets, finite-lived					$ 40
April 5, 2021 Acquisition ("HOA")
Purchase consideration:
Cash				$ 84,370
Issuance of common stock				22,773
Holdback liabilities and amounts in escrow				1,000
Contingent consideration - equity-classified				6,685
Total purchase consideration:				114,828
Assets:
Cash, cash equivalents and restricted cash				17,766
Current assets				235,669
Property and equipment				615
Operating lease right-of-use assets				$ 1,258
Intangible assets:
Weighted Average Useful Life (in years)				9 years 6 months
Goodwill				$ 45,370
Other non-current assets				55,165
Total assets acquired				397,795
Current liabilities				(269,460)
Operating lease liabilities, non-current				(898)
Long-term liabilities				(7,434)
Deferred tax liabilities, net				(5,175)
Net assets acquired				114,828
April 5, 2021 Acquisition ("HOA") | Insurance licenses
Intangible assets:
Intangible assets, indefinite				4,960
April 5, 2021 Acquisition ("HOA") | Customer relationships
Intangible assets:
Intangible assets, finite-lived				16,700
April 5, 2021 Acquisition ("HOA") | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived				12,200
April 5, 2021 Acquisition ("HOA") | Value of business acquired
Intangible assets:
Intangible assets, finite-lived				400
April 5, 2021 Acquisition ("HOA") | Renewal rights
Intangible assets:
Intangible assets, finite-lived				$ 7,692
May 20, 2021 Acquisition ("Rynoh")
Purchase consideration:
Cash			$ 32,302
Holdback liabilities and amounts in escrow			3,500
Total purchase consideration:			35,802
Assets:
Cash, cash equivalents and restricted cash			408
Current assets			932
Property and equipment			334
Operating lease right-of-use assets			$ 159
Intangible assets:
Weighted Average Useful Life (in years)			10 years
Goodwill			$ 22,051
Total assets acquired			40,374
Current liabilities			(517)
Operating lease liabilities, non-current			(72)
Deferred tax liabilities, net			(3,983)
Net assets acquired			35,802
May 20, 2021 Acquisition ("Rynoh") | Customer relationships
Intangible assets:
Intangible assets, finite-lived			12,700
May 20, 2021 Acquisition ("Rynoh") | Acquired technology
Intangible assets:
Intangible assets, finite-lived			2,800
May 20, 2021 Acquisition ("Rynoh") | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived			900
May 20, 2021 Acquisition ("Rynoh") | Non-competition agreements
Intangible assets:
Intangible assets, finite-lived			$ 90
September 9, 2021 Acquisition ("AHP")
Purchase consideration:
Cash		$ 43,750
Holdback liabilities and amounts in escrow		2,500
Total purchase consideration:		46,250
Assets:
Cash, cash equivalents and restricted cash		5,078
Current assets		8,221
Property and equipment		17
Operating lease right-of-use assets		$ 913
Intangible assets:
Weighted Average Useful Life (in years)		7 years
Goodwill		$ 45,681
Other non-current assets		25
Total assets acquired		62,677
Current liabilities		(15,487)
Operating lease liabilities, non-current		(685)
Long-term liabilities		(79)
Deferred tax liabilities, net		(176)
Net assets acquired		46,250
September 9, 2021 Acquisition ("AHP") | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived		700
September 9, 2021 Acquisition ("AHP") | Renewal rights
Intangible assets:
Intangible assets, finite-lived		$ 2,042
Floify
Purchase consideration:
Cash	$ 75,959
Issuance of common stock	9,908
Holdback liabilities and amounts in escrow	900
Contingent consideration - liability-classified	8,632
Total purchase consideration:	95,399
Assets:
Cash, cash equivalents and restricted cash	1,508
Current assets	221
Property and equipment	87
Operating lease right-of-use assets	$ 731
Intangible assets:
Weighted Average Useful Life (in years)	5 years 7 months 6 days
Goodwill	$ 53,056
Total assets acquired	96,968
Current liabilities	(1,014)
Operating lease liabilities, non-current	(555)
Net assets acquired	95,399
Floify | Customer relationships
Intangible assets:
Intangible assets, finite-lived	7,000
Floify | Acquired technology
Intangible assets:
Intangible assets, finite-lived	28,300
Floify | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived	6,025
Floify | Non-competition agreements
Intangible assets:
Intangible assets, finite-lived	$ 40
July 23, 2020 Acquisition
Purchase consideration:
Cash							$ 2,000
Issuance of common stock							1,790
Total purchase consideration:							3,790
Assets:
Cash, cash equivalents and restricted cash							382
Current assets							554
Property and equipment							212
Intangible assets:
Goodwill							1,576
Total assets acquired							4,674
Current liabilities							(884)
Net assets acquired							$ 3,790
iRoofing
Purchase consideration:
Cash						6,003
Issuance of common stock						4,711
Contingent consideration						1,749			$ 1,749
Total purchase consideration:						12,463
Assets:
Cash, cash equivalents and restricted cash						119			119
Current assets						212			212
Property and equipment						44			44
Intangible assets:
Goodwill						7,242			7,242
Total assets acquired						14,472			14,472
Current liabilities						(322)			(322)
Deferred tax liabilities, net						(1,687)			(1,687)
Net assets acquired						12,463			12,463
Other Acquisitions
Purchase consideration:
Cash								$ 27,121	325
Issuance of common stock								3,026	358
Deferred acquisition consideration									80
Notes payable									607
Holdback liabilities and amounts in escrow								1,775
Contingent consideration - liability-classified								327
Total purchase consideration:								32,249	1,370
Assets:
Cash, cash equivalents and restricted cash						36		1,473	36
Current assets						7		1,795	7
Property and equipment						2		80	2
Operating lease right-of-use assets								445
Intangible assets:
Goodwill						1,358		14,499	1,358
Other non-current assets								3
Total assets acquired						1,943		35,410	1,943
Current liabilities						(527)		(2,485)	(527)
Operating lease liabilities, non-current								(204)
Long-term liabilities								(46)
Deferred tax liabilities, net						(46)		(426)	(46)
Net assets acquired						1,370		32,249	1,370
Other Acquisitions | Trademarks and tradenames
Intangible assets:
Intangible assets, indefinite								4,750
Other Acquisitions | Customer relationships
Intangible assets:
Intangible assets, finite-lived								10,320
Other Acquisitions | Acquired technology
Intangible assets:
Intangible assets, finite-lived								1,340
Other Acquisitions | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived								650
Other Acquisitions | Non-competition agreements
Intangible assets:
Intangible assets, finite-lived								$ 55
Total Acquisition
Business Combinations
Number of business combination transactions | item								5
Purchase consideration:
Cash								$ 283,698	8,328
Issuance of common stock								35,707	6,859
Deferred acquisition consideration									80
Notes payable									607
Holdback liabilities and amounts in escrow								9,825
Contingent consideration						1,749			1,749
Contingent consideration - equity-classified								6,685
Contingent consideration - liability-classified								10,369
Total purchase consideration:								346,284	17,623
Assets:
Cash, cash equivalents and restricted cash						537		27,268	537
Current assets						773		251,777	773
Property and equipment						258		2,129	258
Operating lease right-of-use assets								4,889
Intangible assets:
Goodwill						10,176		197,365	10,176
Other non-current assets								55,193
Total assets acquired						21,089		664,725	21,089
Current liabilities						(1,733)		(295,834)	(1,733)
Operating lease liabilities, non-current								(3,262)
Long-term liabilities								(9,585)
Deferred tax liabilities, net						(1,733)		(9,760)	(1,733)
Net assets acquired						$ 17,623		346,284	$ 17,623
Total Acquisition | Insurance licenses
Intangible assets:
Intangible assets, indefinite								4,960
Total Acquisition | Trademarks and tradenames
Intangible assets:
Intangible assets, indefinite								4,750
Total Acquisition | Customer relationships
Intangible assets:
Intangible assets, finite-lived								48,370
Total Acquisition | Acquired technology
Intangible assets:
Intangible assets, finite-lived								35,965
Total Acquisition | Trademarks and tradenames
Intangible assets:
Intangible assets, finite-lived								21,700
Total Acquisition | Non-competition agreements
Intangible assets:
Intangible assets, finite-lived								225
Total Acquisition | Value of business acquired
Intangible assets:
Intangible assets, finite-lived								400
Total Acquisition | Renewal rights
Intangible assets:
Intangible assets, finite-lived								$ 9,734