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Equity-based Compensation Plans - Summary of Class B Units' Activity (Details) - QLH Class B Units - QLH Class B Profits Interests - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of units, Beginning balance	163,800	98,090	81,590
Number of units, Granted	25,500	100,738	19,000
Number of units, Repurchased	(8,568)	(31,799)
Number of units, Forfeited	(3,432)	(3,229)	(2,500)
Number of units, Settled or cancelled	(177,300)
Number of units, Ending balance		163,800	98,090
Weighted average grant date fair value/unit, Beginning balance	$ 61.62	$ 45.25	$ 41.36
Weighted average grant date fair value/unit, Granted	105.85	71.69	62.08
Weighted average grant date fair value/unit, Repurchased	51.03	44.61
Weighted average grant date fair value/unit, Forfeited	74.22	46.09	46.09
Weighted average grant date fair value/unit, Settled or cancelled	$ 68.25
Weighted average grant date fair value/unit, Ending balance		$ 61.62	$ 45.25
Aggregate intrinsic value		$ 28,622	$ 22,244	$ 6,274

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options cancelled weighted average grant date fair value.

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No definition available.

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Share based compensation arrangement by share based payment award equity instruments other than options exercised weighted average grant date fair value.

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Share based compensation arrangement by share based payment award equity instruments other than options outstanding weighted average grant date fair value.

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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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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Number of non-option equity instruments exercised by participants.

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Number of shares under non-option equity instrument agreements for which rights to exercise lapsed.

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Net number of non-option equity instruments granted to participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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