Schedule I: Condensed Financial Information of Registrant - Condensed Statements of Cashflows (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 31, 2020	Dec. 19, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss			$ (106,606)	$ (54,032)	$ (103,319)
Adjustments to reconcile net loss to net cash used in operating activities
Loss on re measurement of private warrant liability			15,389	(2,427)
Loss on remeasurement of earnout liability			18,519
Interest expense (non-cash)			2,387	7,488	2,369
Change in operating assets and liabilities, net of acquisitions and divestitures
Accrued expenses and other current liabilities			(15,981)	(15,946)	7,704
Net cash used in operating activities			(34,777)	(48,669)	(29,335)
Cash flows from investing activities:
Net cash used in investing activities			(263,433)	(10,671)	(5,208)
Cash flows from financing activities:
Proceeds from recapitalization and PIPE financing				305,133
Distribution to stockholders				(30,000)
Transaction costs - recapitalization			(262)	(5,652)
Proceeds from debt issuance, net of fees		$ 3,000	413,537	66,190	31,300
Capped call transactions			(52,913)
Proceeds from exercises of warrants			126,741
Proceeds from exercises of stock options and Legacy Porch warrants			4,288	911	114
Income tax withholdings paid upon vesting of restricted stock units			(28,877)
Net cash provided by financing activities			415,549	259,614	34,486
Net change in cash, cash equivalents, and restricted cash			117,339	200,274	(57)
Cash, cash equivalents, and restricted cash, beginning of period			207,453	7,179	7,236
Cash, cash equivalents, and restricted cash end of period	$ 207,453		324,792	$ 207,453	$ 7,179
Parent
Cash flows from operating activities:
Net loss	3,731		(106,606)
Adjustments to reconcile net loss to net cash used in operating activities
Equity in net loss of subsidiary	(1,360)		67,046
Loss on re measurement of private warrant liability	(2,427)		15,389
Loss on remeasurement of earnout liability			18,519
Interest expense (non-cash)			643
Change in operating assets and liabilities, net of acquisitions and divestitures
Accrued expenses and other current liabilities			930
Net cash used in operating activities	(56)		(4,079)
Cash flows from investing activities:
Paid to subsidiary	(269,425)		(458,697)
Net cash used in investing activities	(269,425)		(458,697)
Cash flows from financing activities:
Proceeds from recapitalization and PIPE financing	305,133
Distribution to stockholders	(30,000)
Transaction costs - recapitalization	(5,652)
Proceeds from debt issuance, net of fees			413,537
Capped call transactions			(52,913)
Proceeds from exercises of warrants			126,741
Proceeds from exercises of stock options and Legacy Porch warrants			4,288
Income tax withholdings paid upon vesting of restricted stock units			(28,877)
Net cash provided by financing activities	$ 269,481		$ 462,776