Investments In Affiliated Companies, Partnership And Other Companies (Investments In Affiliated Companies) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Investments in and Advances to Affiliates [Line Items]
Companies accounted for under the equity method		$ 141,375	$ 141,594
Investment Owned, at Fair Value		42,963	59,980
Investments in affiliated companies		$ 184,338	$ 201,574
Noncontrolling Interest, Ownership Held	50.00%

Noncontrolling Interest, Ownership Held

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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- Definition

Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

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-Publisher FASB
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-Topic 210
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-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

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.

+ References

No definition available.

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