Equity Incentive Plans (Summary Of Exercisable Options) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($) $ / shares shares
Options outstanding	92,805
Weighted avg. life remaining	2 years 3 months 18 days
Weighted avg. exercise price \| $ / shares	$ 58.10
Aggregate intrinsic value \| $	$ 0
44.44-49.99 [Member]
Options outstanding	7,372
Weighted avg. life remaining	1 year 7 months 6 days
50.00 - 59.99 [Member]
Options outstanding	31,008
Weighted avg. life remaining	1 year 6 months
60.00 - 69.99 [Member]
Options outstanding	50,754
Weighted avg. life remaining	2 years 9 months 18 days
70.00 - 76.63 [Member]
Options outstanding	3,671
Weighted avg. life remaining	4 years 10 months 24 days

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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