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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Pension plan assets	$ 59,189	$ 61,939
Contingent consideration	4,463	4,609
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Pension plan assets	0	0
Contingent consideration	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Pension plan assets		0
Contingent consideration	0	0
Level 2 \| Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Pension plan assets	0
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Pension plan assets		61,939
Contingent consideration	4,463	$ 4,609
Level 3 \| Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Pension plan assets	$ 59,189

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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