Tax Cuts And Jobs Act Of 2017, Income Tax Expense (Benefit), Discrete Tax Benefit

No definition available.

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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.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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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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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Employee Benefits - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Mar. 31, 2019	Sep. 30, 2018	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Service costs included in net periodic pension expense		$ 0
Pension contribution			$ 20,400,000
Expected long-term rate of return on plan assets		4.80%		7.50%
Return to provision discrete tax benefit due to decrease in federal statutory tax rate	$ 2,900,000
Fixed Income Funds \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		85.00%		30.00%
Fixed Income Funds \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		95.00%		50.00%
Equity Securities \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		5.00%		50.00%
Equity Securities \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		15.00%		70.00%