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Related Party Transactions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ABS [Member]
Related Party [Abstract]
Related party expenses	$ 1,620,000	$ 2,377,000	$ 1,774,000
UK Protection & Indemnity Association [Member]
Related Party [Abstract]
Related party expenses	3,215,000	3,000,000
Signal [Member]
Related Party [Abstract]
Related party expenses	551,000	667,000	1,391,000
Strasburger & Price, LLP [Member]
Related Party [Abstract]
Legal services	$ 2,900,000	$ 1,598,000	$ 1,278,000

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- References

No definition available.

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- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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