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Underwriting Information - Gross Written Premiums by Insurance Subsidiary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gross written premiums
Amount	$ 881,868	$ 535,175	$ 354,360
% of GWP	100.00%	100.00%	100.00%
Subsidiaries
Gross written premiums
Amount	$ 881,868	$ 535,175	$ 354,360
% of GWP	100.00%	100.00%	100.00%
PSIC
Gross written premiums
Amount	$ 489,720	$ 383,064	$ 324,870
% of GWP	55.50%	71.60%	91.70%
PESIC
Gross written premiums
Amount	$ 392,148	$ 152,111	$ 29,490
% of GWP	44.50%	28.40%	8.30%

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- Definition

Percentage of gross written premiums.

+ References

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- Definition

Amount of direct and assumed premiums written.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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