Business Combination ( Schedule of Present Value Of Future Insurance Profits Expected Amortization) (Details) $ in Thousands	May 05, 2021 USD ($)
Fair value adjustment on reserves, net
Business Acquisition [Line Items]
Amount at May 5, 2021	$ 38,700
NORCAL Group
Business Acquisition [Line Items]
Amount at May 5, 2021	53,844
2021	14,644
2022	15,758
2023	8,333
2024	5,326
2025	3,350
Thereafter	6,433
NORCAL Group \| Fair value adjustment on reserves, net
Business Acquisition [Line Items]
Amount at May 5, 2021	$ 38,701
Estimated amortization period (years)	7 years
2021	$ 7,768
2022	10,595
2023	8,090
2024	5,083
2025	3,107
Thereafter	4,058
NORCAL Group \| Unearned premium VOBA, net
Business Acquisition [Line Items]
Amount at May 5, 2021	$ 11,676
Estimated amortization period (years)	1 year
2021	$ 6,737
2022	4,939
2023	0
2024	0
2025	0
Thereafter	0
NORCAL Group \| DDR reserve VOBA
Business Acquisition [Line Items]
Amount at May 5, 2021	$ 3,467
Estimated amortization period (years)	15 years
2021	$ 139
2022	224
2023	243
2024	243
2025	243
Thereafter	$ 2,375

Present Value of Future Insurance Profits, Expected Amortization, Thereafter

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Present Value of Future Insurance Profits, Expected Amortization, Total

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized in remainder of current fiscal year.

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized during fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized during next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized during third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized during second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Weighted average amortization period of present value of future profits of insurance contract acquired in business combination, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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