Investments (Realized Gains (Losses)) (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	$ 1,448	$ (2,869)		$ 142	$ 3,092
Proceeds from Sale of Debt Securities, Available-for-sale				2,982	10,414
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	5	10		6	20
Number of Equity Securities Sold	0	0		0	0
Equity Securities [Member]
Gain (Loss) on Securities [Line Items]
Realized investment gains (losses), net	$ 1,300	$ 200		$ 200	$ 800
Debt Securities [Member]
Gain (Loss) on Securities [Line Items]
Proceeds from Sale of Debt Securities, Available-for-sale	5,363	2,755		6,303	10,414
Available-for-sale Securities, Gross Realized Gains	123	107		123	109
Available-for-sale Securities, Gross Realized Losses	$ 19	$ 182		$ 57	$ 365
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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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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