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Share-Based Compensation - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 19,269,000 | $ 14,278,000 | $ 84,958,000 | $ 67,751,000
RSUs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense |  |  | $ 0 |
Grant expiration period |  |  | 8 years |
Unrecognized compensation expense related to non-vested stock |  |  | $ 83,800,000 |
Performance Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense |  |  | 0 |
Unrecognized compensation expense related to non-vested stock |  |  | 337,800,000 |
CVARs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense |  |  | $ 0 |
Grant expiration date |  |  | Mar. 31, 2026 |
Grant, Description |  |  | each CVAR pays in common shares the excess of (a) the lesser of (i) the fair market value of a common share as of the settlement date or (ii) the cap of $37.10, over (b) the hurdle price of either $18.70 or $33.63, as applicable to each grant. |
Unrecognized compensation expense |  |  | $ 23,000,000.0 |
Performance RSU [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | 0 | 0 | 12,300,000 |
Unrecognized compensation expense |  |  | 2,800,000 |
RSL Common Share Award |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 800,000 |  | $ 100,000 |
Remaining weighted-average service period |  |  | 3 years 4 months 20 days |
Unrecognized compensation expense |  |  | $ 6,900,000 |
Restricted common stock fair value |  |  | $ 15,600,000 |
2015 EIP [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common shares reserved for future issuance | 22,800,000 |  | 22,800,000 |
Common shares available for grant | 786,125 |  | 10,296,392 |
Share-based compensation expense |  |  | $ 32,300,000 | $ 31,800,000
Unrecognized compensation expense related to non-vested stock |  |  | $ 70,800,000 |
Remaining weighted-average service period |  |  | 2 years 11 months 15 days |
Stock options vested |  |  | 5,533,848 | 4,123,953
2015 EIP [Member] | Special Reserve [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common shares reserved for future issuance |  |  | 26,558,238 |
Common shares reserved for performance options and capped value appreciation rights | 26,558,238 |  |  |
Common shares available for grant | 0 |  | 0 |
2015 EIP [Member] | RSUs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 0 | 0 |  |
2015 EIP [Member] | Performance Options [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | 0 | 0 |  |
2015 EIP [Member] | CVARs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | 0 | 0 |  |
2015 EIP [Member] | Stock Option [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | 10,300,000 | 7,800,000 |  |
Grant contractual term |  |  | 6 years 5 months 26 days |
Subsidiary EIPs [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 8,200,000 | $ 6,500,000 | $ 29,100,000 | $ 22,100,000
Grant vesting period | 4 years |  | 4 years |
Grant contractual term | 10 years |  | 10 years |
pRSU Plan [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common shares reserved for future issuance | 200,000 |  | 200,000 |
Grant expiration period | 8 years |  | 8 years |
Equity repurchase |  |  | $ 17,044,465 |
Percentage of share repurchased |  |  | 11.23% |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Description of terms of share-based payment arrangement. Includes, but is not limited to, type of award or grantee and reason for issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Date the equity-based award expires, in YYYY-MM-DD format. + 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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