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Equity Incentive Plan - Summary of Activity of RSUs and PSUs (Details) - 2018 Equity Incentive Plan - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning balance	2,203	3,004	4,437
Number of Shares, Granted	736	576	400
Number of Shares, Vested	(1,018)	(986)	(953)
Number of Shares, Forfeited	(229)	(391)	(880)
Number of Shares, Ending balance	1,692	2,203	3,004
Weighted Average Grant Date Fair Value, Beginning balance	$ 10.64	$ 10.28	$ 10.13
Weighted Average Grant Date Fair Value, Granted	14.12	12.12	11.32
Weighted Average Grant Date Fair Value, Vested	10.41	10.35	10.13
Weighted Average Grant Date Fair Value, Forfeited	13.40	10.74	10.17
Weighted Average Grant Date Fair Value, Ending balance	$ 11.92	$ 10.64	$ 10.28
PSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Beginning balance	106
Number of Shares, Granted	154	116
Number of Shares, Forfeited	(31)	(10)
Number of Shares, Ending balance	229	106
Weighted Average Grant Date Fair Value, Beginning balance	$ 13.88
Weighted Average Grant Date Fair Value, Granted	16.28	$ 13.88
Weighted Average Grant Date Fair Value, Forfeited	16.97	13.88
Weighted Average Grant Date Fair Value, Ending balance	$ 15.07	$ 13.88

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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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