CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 39,008	$ (105,891)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	29,201	20,061
Non-cash interest and other	5,207	12,411
Loss on extinguishment of long-term debt	0	990
Share-based compensation	118,623	77,303
Loss on revaluation of equity investment	28,900	0
Bitcoin impairment losses	19,860	0
Non-cash lease expense	20,432	15,125
Transaction and loan losses	20,395	108,883
Change in deferred income taxes	(60)	(984)
Changes in operating assets and liabilities:
Settlements receivable	(114,458)	60,248
Customer funds	(1,007,144)	(210,201)
Purchases and originations of loans held for sale	(812,492)	(573,502)
Sales and principal payments of loans held for sale	531,716	555,584
Customers payable	1,018,906	212,929
Settlements payable	24,564	(6,684)
Charge-offs to accrued transaction losses	(15,193)	(17,413)
Other assets and liabilities	(5,206)	(27,563)
Net cash provided by (used in) operating activities	(97,741)	121,296
Cash flows from investing activities:
Purchase of marketable debt securities	(401,161)	(363,874)
Proceeds from maturities of marketable debt securities	139,353	98,146
Proceeds from sale of marketable debt securities	249,342	247,027
Purchase of marketable debt securities from customer funds	(119,411)	(144,494)
Proceeds from maturities of marketable debt securities from customer funds	187,500	65,000
Proceeds from sale of marketable debt securities from customer funds	0	22,457
Purchase of property and equipment	(34,149)	(26,137)
Purchase of bitcoin investments	(170,000)	0
Purchase of other investments	(28,470)	0
Proceeds from sale of equity investments	18,973	0
Business combinations, net of cash acquired	0	(12,742)
Net cash used in investing activities	(158,023)	(114,617)
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes, net	0	986,241
Purchase of convertible senior note hedges	0	(149,200)
Proceeds from issuance of warrants	0	99,500
Proceeds from PPP Liquidity Facility advances	494,300	0
Repayments of PPP Liquidity Facility advances	(194,186)	0
Payments for tax withholding related to vesting of restricted stock units	(152,013)	(48,772)
Proceeds from the exercise of stock options and purchases under the employee stock purchase plan	32,891	31,406
Other financing activities	0	(1,055)
Net cash provided by financing activities	180,992	918,120
Effect of foreign exchange rate on cash and cash equivalents	(8,206)	(13,588)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(82,978)	911,211
Cash, cash equivalents, and restricted cash, beginning of period	3,201,863	1,098,706
Cash, cash equivalents, and restricted cash, end of period	$ 3,118,885	$ 2,009,917