Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Total
Balance (ASU 2016-13 [Member]) at Mar. 31, 2020			$ (417)			$ (417)
Balance at Mar. 31, 2020	$ 303	$ 4,222,580		$ (930,064)	$ (7,372)		$ 3,285,447
Balance, shares at Mar. 31, 2020	303,428,142
Equity compensation expense		8,780					8,780
Issuance of common stock under equity compensation plans	$ 1	2,143					2,144
Issuance of common stock under equity compensation plans, shares	341,230
Net income (loss)				(58,694)			(58,694)
Foreign currency translation adjustment					6,353		6,353
Change in fair value of interest rate caps, net of taxes					(4,184)		(4,184)
Other		(75)					(75)
Balance at Jun. 30, 2020	$ 304	4,233,428		(989,175)	(5,203)		3,239,354
Balance, shares at Jun. 30, 2020	303,769,372
Balance (ASU 2016-13 [Member]) at Mar. 31, 2020			$ (417)			$ (417)
Balance at Mar. 31, 2020	$ 303	4,222,580		(930,064)	(7,372)		3,285,447
Balance, shares at Mar. 31, 2020	303,428,142
Net income (loss)							(101,316)
Foreign currency translation adjustment							11,574
Change in fair value of interest rate caps, net of taxes							(6,180)
Balance at Sep. 30, 2020	$ 304	4,242,721		(1,031,797)	(1,978)		3,209,250
Balance, shares at Sep. 30, 2020	304,426,569
Balance at Jun. 30, 2020	$ 304	4,233,428		(989,175)	(5,203)		3,239,354
Balance, shares at Jun. 30, 2020	303,769,372
Equity compensation expense		12,372					12,372
Issuance of common stock under equity compensation plans		408					408
Issuance of common stock under equity compensation plans, shares	911,961
Employee tax withholding on vesting of equity compensation awards		(3,131)					(3,131)
Employee tax withholding on vesting of equity compensation awards, shares	(254,764)
Net income (loss)				(42,622)			(42,622)
Foreign currency translation adjustment					5,221		5,221
Change in fair value of interest rate caps, net of taxes					(1,996)		(1,996)
Other		(356)					(356)
Balance at Sep. 30, 2020	$ 304	4,242,721		(1,031,797)	(1,978)		3,209,250
Balance, shares at Sep. 30, 2020	304,426,569
Balance at Mar. 31, 2021	$ 307	4,283,391		(1,042,691)	11,221		3,252,228
Balance, shares at Mar. 31, 2021	306,796,076
Equity compensation expense		23,191					23,191
Issuance of common stock under equity compensation plans	$ 2	1,443					1,445
Issuance of common stock under equity compensation plans, shares	1,948,163
Employee tax withholding on vesting of equity compensation awards	$ (1)	(13,015)					(13,016)
Employee tax withholding on vesting of equity compensation awards, shares	(564,116)
Net income (loss)				(3,605)			(3,605)
Foreign currency translation adjustment					3,571		3,571
Change in fair value of interest rate caps, net of taxes					119		119
Conversion of tangible equity units	$ 3	(3)
Conversion of tangible equity units, shares	2,497,813
Other		(80)					(80)
Balance at Jun. 30, 2021	$ 311	4,294,927		(1,046,296)	14,911		3,263,853
Balance, shares at Jun. 30, 2021	310,677,936
Balance at Mar. 31, 2021	$ 307	4,283,391		(1,042,691)	11,221		3,252,228
Balance, shares at Mar. 31, 2021	306,796,076
Net income (loss)							(40,009)
Foreign currency translation adjustment							1,415
Change in fair value of interest rate caps, net of taxes							160
Balance at Sep. 30, 2021	$ 311	4,313,759		(1,082,700)	12,796		3,244,166
Balance, shares at Sep. 30, 2021	311,311,208
Balance at Jun. 30, 2021	$ 311	4,294,927		(1,046,296)	14,911		3,263,853
Balance, shares at Jun. 30, 2021	310,677,936
Equity compensation expense		23,776					23,776
Issuance of common stock under equity compensation plans		1,031					1,031
Issuance of common stock under equity compensation plans, shares	896,107
Employee tax withholding on vesting of equity compensation awards		(5,985)					(5,985)
Employee tax withholding on vesting of equity compensation awards, shares	(262,835)
Net income (loss)				(36,404)			(36,404)
Foreign currency translation adjustment					(2,156)		(2,156)
Change in fair value of interest rate caps, net of taxes					41		41
Other		10					10
Balance at Sep. 30, 2021	$ 311	$ 4,313,759		$ (1,082,700)	$ 12,796		$ 3,244,166
Balance, shares at Sep. 30, 2021	311,311,208