The maximum number of shares purchasable under the capped call transactions.

No definition available.

Name:	prch_CappedCallTransactionsAuthorizedShares
Namespace Prefix:	prch_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The strike price to purchase common shares under the capped call transactions.

+ References

No definition available.

+ Details

Name:	prch_CappedCallTransactionsStrikePrice
Namespace Prefix:	prch_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=prch_ConvertibleSeniorNotesDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=prch_RestrictedStockUnitsAndAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=prch_PerformanceRestrictedStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=prch_PublicAndPrivateWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=prch_EarnoutSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_ConvertibleDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=prch_ContingentConsiderationBusinessCombinationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Net Loss Per Share - Computation of diluted net loss per antidilutive (Details) - $ / shares		3 Months Ended		9 Months Ended
	Sep. 16, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 24, 2023
Convertible senior notes, due 2026
Net Loss Per Share
Capped call transactions, strike price (per unit)	$ 25
Capped call transactions, authorized shares	16,998,130
Common Stock \| Forecast
Net Loss Per Share
Share price (in usd per share)						$ 22.00
Stock options
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		3,685,526	4,149,394	3,685,526	4,149,394
Restricted stock units and awards
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		8,654,894	5,193,177	8,654,894	5,193,177
Performance restricted stock units
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		4,055,997	1,825,719	4,055,997	1,825,719
Public and private warrants
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		1,795,700	1,795,700	1,795,700	1,795,700
Earnout shares
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		2,050,000	2,050,000	2,050,000	2,050,000
Convertible debt
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		22,330,903	16,998,130	22,330,903	16,998,130
Contingent consideration - business combinations
Net Loss Per Share
Antidilutive securities excluded from computation of earnings per share, amount		24,362,726	8,354,437	24,362,726	8,354,437