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Employee Retirement Plan - 401(k) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Percentage of eligible compensation matched	6.00%
Company match percentage	50.00%
Total expense related to the Retirement Plan, including optional contributions	$ 2.1	$ 2.0	$ 1.8
Deferred compensation liability	10.4	11.3
Expense recorded for deferred compensation plan	$ 1.1	$ 1.9	$ 1.2

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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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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Amount of cost for defined contribution plan.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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

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