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Equity-based Compensation - Additional Information (Details) - QL Holdings LLC and Subsidiaries - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |
Number of vested units |  |  | 39,617 |
Aggregate intrinsic value of vested shares |  |  | $ 10.1 |
Equity-based compensation expense recognized amount paid to redeem units exceeded fair value at redemption | $ 0.0 | $ 0.0 | 0.8 | $ 1.3
Cash used to settle redemptions | $ 0.0 | $ 1.1 | $ 2.2 | $ 5.8
Class B Units |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |
Number of vested units |  |  | 82,161 | 49,242
Number of unvested units | 95,139 | 103,558 | 95,139 | 103,558
Weighted average grant date fair value per unit, vested |  |  | $ 55.96 | $ 42.93
Weighted average grant date fair value per unit, unvested | $ 87.79 | $ 70.43 | $ 87.79 | $ 70.43
Aggregate intrinsic value of unvested shares | $ 38.1 |  | $ 38.1 |
Unrecognized compensation cost | $ 8.2 | $ 6.4 | $ 8.2 | $ 6.4
Weighted-average period for recognize compensation cost |  |  | 3 years 1 month 6 days | 3 years 3 months 18 days
Class B Units | QLH Class B Restricted Unit Plan |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |
Number of units issued | 177,300 |  | 177,300 |
Number of units remained available for future grant | 0 |  | 0 |
Class B Units | QLH Class B Restricted Unit Plan | Four-year Vesting Period |  |  |  |
Share Based Compensation Arrangement by Share Based Payment Award [Line Items] |  |  |  |
Vesting period |  |  | 4 years |
Vesting percentage |  |  | 25.00% |

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- Definition Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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