CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock 2022 Notes	Common Stock 2025 Notes	Common Stock	Additional Paid-In Capital 2022 Notes	Additional Paid-In Capital 2025 Notes	Additional Paid-In Capital	Accumulated Deficit 2022 Notes	Accumulated Deficit 2025 Notes	Accumulated Deficit	Accumulated Other Comprehensive Loss 2022 Notes	Accumulated Other Comprehensive Loss 2025 Notes	Accumulated Other Comprehensive Loss	2022 Notes	2025 Notes	Total
Balance as of beginning of the period at Dec. 31, 2019			$ 73,000			$ 1,538,716,000			$ (507,525,000)			$ (17,239,000)			$ 1,014,025,000
Balance as of beginning of the period (in shares) at Dec. 31, 2019			72,761,941
Stockholders' Equity (Deficit)
Exercise of stock options			$ 0			14,830,000			0			0			14,830,000
Exercise of stock options (in shares)			671,279
Issuance of common stock upon vesting of restricted stock units			$ 1,000			(1,000)			0			0			0
Issuance of common stock upon vesting of restricted stock units (in shares)			642,411
Issuance of common stock for Notes	$ 0			$ 58,000			$ 0			$ 0			$ 58,000
Issuance of common stock for Notes (in shares)	655
Stock-based compensation			$ 0			18,421,000			0			0			18,421,000
Other comprehensive loss, net of tax			0			0			0			(17,554,000)			(17,554,000)
Net loss			0			0			(29,603,000)			0			(29,603,000)
Balance as of end of the period at Mar. 31, 2020			$ 74,000			1,572,024,000			(537,128,000)			(34,793,000)			1,000,177,000
Balance as of end of the period (in shares) at Mar. 31, 2020			74,076,286
Balance as of beginning of the period at Dec. 31, 2019			$ 73,000			1,538,716,000			(507,525,000)			(17,239,000)			1,014,025,000
Balance as of beginning of the period (in shares) at Dec. 31, 2019			72,761,941
Balance as of end of the period at Dec. 31, 2020			$ 150,000			16,857,797,000			(992,661,000)			18,518,000			15,883,804,000
Balance as of end of the period (in shares) at Dec. 31, 2020			150,281,099
Stockholders' Equity (Deficit)
Exercise of stock options			$ 1,000			11,907,000			0			0			11,908,000
Exercise of stock options (in shares)			1,238,112
Issuance of common stock upon vesting of restricted stock units			$ 1,000			(1,000)			0			0			0
Issuance of common stock upon vesting of restricted stock units (in shares)			976,999
Issuance of common stock for Notes	$ 1,000	$ 1,000		270,111,000	$ 288,485,000		0	$ 0		0	$ 0		270,112,000	$ 288,486,000
Issuance of common stock for Notes (in shares)	1,058,373	1,056,861
Equity portion of extinguishment of Notes	$ 0	$ 0		$ (224,081,000)	$ (237,261,000)		$ 0	$ 0		$ 0	$ 0		$ (224,081,000)	$ (237,261,000)
Retirement of shares related to acquisition			$ 0			(40,329,000)			0			0			(40,329,000)
Retirement of shares related to acquisition (in shares)			(205,280)
Stock-based compensation			$ 0			90,000,000			0			0			90,000,000
Other comprehensive loss, net of tax			0			0			0			(13,492,000)			(13,492,000)
Net loss			0			0			(199,649,000)			0			(199,649,000)
Balance as of end of the period at Mar. 31, 2021			$ 154,000			$ 17,016,628,000			$ (1,192,310,000)			$ 5,026,000			$ 15,829,498,000
Balance as of end of the period (in shares) at Mar. 31, 2021			154,406,164