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Sale of Subsidiary (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds From Sale Of Insurance Agency, Discontinued Operations	$ 25,159
Discontinued Operations, Disposed of by Sale [Member] | Avon [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of investment in Eastern Re. Ltd transferred	40.00%
Net cash proceeds	$ 25,159
Proceeds From Sale Of Insurance Agency, Discontinued Operations	$ 25,200

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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.

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