Quarterly Summary of Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 561,188	$ 1,077,759	$ 623,525	$ 283,169	$ 374,910	$ 938,735	$ 542,205	$ 276,839	$ 2,545,641	$ 2,132,689	$ 2,020,437
Gross profit	298,650	613,897	318,977	142,566	192,998	507,632	273,024	130,019	1,374,090	1,103,673	1,040,250
Income (loss) from operations	54,645	328,655	128,604	(7,699)	16,655	255,766	97,131	(31,417)	504,205	338,135	327,320
Net (loss) income	$ 33,458	$ 255,536	$ 101,554	$ (7,973)	$ 16,090	$ 201,593	$ 77,810	$ (19,351)	$ 382,575	$ 276,142	$ 264,308
Net (loss) income per share
Basic (in dollars per share)	$ 1.19	$ 9.09	$ 3.62	$ (0.28)	$ 0.57	$ 7.21	$ 2.73	$ (0.67)	$ 13.64	$ 9.73	$ 8.92
Diluted (in dollars per share)	$ 1.18	$ 8.99	$ 3.58	$ (0.28)	$ 0.57	$ 7.14	$ 2.71	$ (0.67)	$ 13.47	$ 9.62	$ 8.84