Description of Business and Summary of Significant Accounting Policies - Leases (Details)	Dec. 31, 2023
Accounting Policies [Abstract]
Operating lease, threshold for recognition	1 year

Lessee, Operating Lease, Threshold For Recognition

No definition available.

Name:	prch_LesseeOperatingLeaseThresholdForRecognition
Namespace Prefix:	prch_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant