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Employee Benefit Plans (Details) - 401(k) Plan	12 Months Ended
	Dec. 31, 2018 USD ($)
Employee Benefit Plans
Maximum annual employee contribution, as a percentage	20.00%
Maximum annual employee contribution	$ 18,500
Aggregate discretionary employer matching contributions	3,200,000
ETP
Employee Benefit Plans
Aggregate discretionary employer matching contributions	$ 900,000

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- Definition

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

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- Definition

Maximum amount the employee may contribute to a defined contribution plan.

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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