Investments (Realized Gains (Losses)) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	$ (1,306)	$ 5,961
Proceeds from Sale of Debt Securities, Available-for-sale	940	7,659
Sale of other long-term investments and real estate	$ 0	6,996
Gains (Losses) on Sales of Investment Real Estate		$ 5,500
Sale of bonds, number of available-for-sale securities sold	1	10
Number of Equity Securities Sold	0	0
Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	$ (1,100)	$ 600
Debt Securities [Member]
Gain (Loss) on Securities [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	940	7,659
Available-for-sale Securities, Gross Realized Gains	0	2
Available-for-sale Securities, Gross Realized Losses	$ 38	183
Real Estate [Member]
Gain (Loss) on Securities [Line Items]
Sale of other long-term investments and real estate		$ 7,500

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The number of securities classified as available-for-sale sold by the Company.

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This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

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The cash inflow associated with the sale and maturity (principal being due) of other investments, prepayment and call (request of early payment) of other investments not otherwise defined in the taxonomy.

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