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Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 01, 2020	Jul. 01, 2019
Employee Benefits
Employer contributions charged to expense	$ 2.1	$ 1.8	$ 1.3
Percentage of employer maximum total contributions	5.00%
Funded status of the plan (as a percent)				92.50%	93.70%
Percentage of employer's matching contribution of the employee's compensation	100.00%
Percentage of employee's compensation on which employer matches	3.00%
Percentage of employer's matching contribution of the employee's compensation	50.00%
Percentage of employee's compensation on which employer matches	2.00%
Employer contributions charged to expense	$ 1.6	$ 1.4	$ 1.4

X

- Definition

Percentage of employees' gross pay for which the employer contributes a 100% matching contribution to a defined contribution plan.

+ References

No definition available.

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X

- Definition

Percentage of employees' gross pay for which the employer contributes a 50% matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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X

- Definition

Percentage employer matches of the employee's first 3% percentage contribution matched.

+ References

No definition available.

+ Details

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X

- Definition

Percentage employer matches of the employee's next 2% percentage contribution matched.

+ References

No definition available.

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X

- Definition

Percentage of funded status under multiemployer plan.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

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X

- Definition

Amount of cost for employer contribution to multiemployer plan. Multiemployer plan includes, but is not limited to, pension plan determined to be individually significant and insignificant and other postretirement benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948

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- Definition

Percentage of employer contribution required by collective-bargaining arrangement (CBA) to total employer contribution for multiemployer pension plan determined to be individually significant.

+ References

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-Publisher FASB
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X

- References

No definition available.

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