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Employee Benefits Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	200.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Defined Contribution Plan, Employer Matching Contribution, Eligible Earnings Limit by IRS Amount	$ 285	$ 280	$ 275
Defined Contribution Plan, Employer Discretionary Contribution Amount	4,000	4,200	$ 4,100
Deferred Compensation Liability, Current and Noncurrent	38,600	36,000
Separate Unrestricted Cash For Deferred Compensation Plan.	39,500	36,700
Officer [Member]
Defined Contribution Plan Disclosure [Line Items]
Separate Unrestricted Cash For Deferred Compensation Plan.	$ 38,600	$ 36,000

X

- Definition

Defined Contribution Plan, Employer Matching Contribution, Eligible Earnings Limit by IRS Amount

+ References

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- Definition

Separate Unrestricted Cash For Deferred Compensation Plan.

+ References

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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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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- Definition

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

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No definition available.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

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