For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ References

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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.

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No definition available.

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- Definition

Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

+ References

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- Definition

Amount of cost for defined contribution plan.

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Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, long-term rate of return on assets	7.00%	7.00%	7.00%
Defined benefit plan, expected future employer contributions, next fiscal year	$ 1.0
Defined contribution plan, compensation expense	$ 3.9	$ 3.8	$ 3.9
Defined Benefit Plan, Equity Investments by Sector Concentration Risk [Member] \| Equity Investment Portfolio, Total [Member] \| Technology Sector [Member]
Defined Benefit Plan Disclosure [Line Items]
Concentrations of risk	21.00%
Defined Benefit Plan, Equity Investments by Sector Concentration Risk [Member] \| Equity Investment Portfolio, Total [Member] \| Financial Services Sector [Member]
Defined Benefit Plan Disclosure [Line Items]
Concentrations of risk	17.00%
Defined Benefit Plan, Equity Investments by Sector Concentration Risk [Member] \| Equity Investment Portfolio, Total [Member] \| Healthcare Sector [Member]
Defined Benefit Plan Disclosure [Line Items]
Concentrations of risk	15.00%
Defined Benefit Plan, Equity Investments by Sector Concentration Risk [Member] \| Equity Investment Portfolio, Total [Member] \| Consumer Cyclical Goods Sector [Member]
Defined Benefit Plan Disclosure [Line Items]
Concentrations of risk	12.00%
Defined Benefit Plan, Equity Investments by Sector Concentration Risk [Member] \| Equity Investment Portfolio, Total [Member] \| Industrial Sector [Member]
Defined Benefit Plan Disclosure [Line Items]
Concentrations of risk	11.00%