Condensed Consolidated Statements of Shareholders' Equity / Members' Deficit - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Shares	Additional  Paid-In Capital	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Mar. 31, 2019			0
Beginning balance at Mar. 31, 2019	$ (390,258)		$ 0	$ (184,546)	$ (176,002)		$ (29,710)
Increase (Decrease) in Partners' Capital [Roll Forward]
Foreign currency translation	2,165						2,165
Reclassification of related party payable upon reorganization	600,622			600,622
Issuance of common stock in connection with initial public offering, net of underwriters' discounts and commissions and issuance costs (in shares)			38,873,000
Issuance of common stock in connection with initial public offering, net of underwriters' discounts and commissions and issuance costs	585,297		$ 39	585,258
Effect of reorganization (in shares)			241,547,000
Effect of reorganization	278,248		$ 242	271,383			6,623
Contribution for taxes associated with reorganization	265,000			265,000
Restricted stock units vested (in shares)			393,000
Restricted stock awards forfeited (in shares)			(28,000)
Share-based compensation	22,992			22,992
Equity repurchases	(150)			(150)
Net income (loss)	(464,726)				(464,726)
Ending balance (in shares) at Dec. 31, 2019			280,785,000
Ending balance at Dec. 31, 2019	899,190		$ 281	1,560,559	(640,728)		(20,922)
Beginning balance (in shares) at Sep. 30, 2019			280,509,000
Beginning balance at Sep. 30, 2019	886,282		$ 281	1,547,051	(642,491)		(18,559)
Increase (Decrease) in Partners' Capital [Roll Forward]
Foreign currency translation	(2,363)						(2,363)
Restricted stock units vested (in shares)			304,000
Restricted stock awards forfeited (in shares)			(28,000)
Share-based compensation	13,513			13,513
Equity repurchases	(5)			(5)
Net income (loss)	1,763				1,763
Ending balance (in shares) at Dec. 31, 2019			280,785,000
Ending balance at Dec. 31, 2019	899,190		$ 281	1,560,559	(640,728)		(20,922)
Increase (Decrease) in Partners' Capital [Roll Forward]
Shareholders' equity	$ 961,497	$ 306	$ 281	1,573,347	(594,026)	$ 306	(18,105)
Beginning balance (in shares) at Mar. 31, 2020	280,853,040		280,853,000
Beginning balance at Mar. 31, 2020	$ 961,497	306	$ 281	1,573,347	(594,026)	306	(18,105)
Increase (Decrease) in Partners' Capital [Roll Forward]
Foreign currency translation	(9,920)						(9,920)
Restricted stock units vested (in shares)			1,035,000
Restricted stock awards forfeited (in shares)			(103,000)
Issuance of common stock related to employee stock purchase plan (in shares)			331,000
Issuance of common stock related to employee stock purchase plan	$ 9,195			9,195
Exercise of stock options (in shares)	427,000		427,000
Exercise of stock options	$ 6,849			6,849
Share-based compensation	43,091			43,091
Equity repurchases	(36)			(36)
Shareholders' equity	$ 1,059,742	$ 306	$ 281	1,632,446	(594,026)	$ 306	(18,105)
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Net income (loss)	$ 48,760				48,760
Ending balance (in shares) at Dec. 31, 2020	282,542,649		282,543,000
Ending balance at Dec. 31, 2020	$ 1,059,742		$ 281	1,632,446	(544,960)		(28,025)
Increase (Decrease) in Partners' Capital [Roll Forward]
Shareholders' equity	1,022,912		$ 281	1,609,246	(563,376)		(23,239)
Beginning balance (in shares) at Sep. 30, 2020			282,024,000
Beginning balance at Sep. 30, 2020	1,022,912		$ 281	1,609,246	(563,376)		(23,239)
Increase (Decrease) in Partners' Capital [Roll Forward]
Foreign currency translation	(4,786)						(4,786)
Restricted stock units vested (in shares)			229,000
Restricted stock awards forfeited (in shares)			(7,000)
Issuance of common stock related to employee stock purchase plan (in shares)			172,000
Issuance of common stock related to employee stock purchase plan	5,603			5,603
Exercise of stock options (in shares)			125,000
Exercise of stock options	2,020			2,020
Share-based compensation	15,588			15,588
Equity repurchases	(11)			(11)
Shareholders' equity	1,059,742		$ 281	1,632,446	(544,960)		(28,025)
Net income (loss)	$ 18,416				18,416
Ending balance (in shares) at Dec. 31, 2020	282,542,649		282,543,000
Ending balance at Dec. 31, 2020	$ 1,059,742		$ 281	1,632,446	(544,960)		(28,025)
Increase (Decrease) in Partners' Capital [Roll Forward]
Shareholders' equity	$ 1,059,742		$ 281	$ 1,632,446	$ (544,960)		$ (28,025)