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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Schedule of Restricted Cash The following table reconciles cash, cash equivalents, and restricted cash reported on the Company’s consolidated balance sheets to the total amount presented in the consolidated statements of cash flows (in thousands):
As of December 31,
201920202021
Cash and cash equivalents$2,013,547 $5,480,557 $6,067,438 
Cash and cash equivalents included in funds receivable and amounts held on behalf of customers3,129,781 2,153,849 3,645,087 
Restricted cash115 33,846 14,764 
Total cash, cash equivalents, and restricted cash presented in the consolidated statements of cash flows$5,143,443 $7,668,252 $9,727,289 
Schedule of Cash and Cash Equivalents The following table reconciles cash, cash equivalents, and restricted cash reported on the Company’s consolidated balance sheets to the total amount presented in the consolidated statements of cash flows (in thousands):
As of December 31,
201920202021
Cash and cash equivalents$2,013,547 $5,480,557 $6,067,438 
Cash and cash equivalents included in funds receivable and amounts held on behalf of customers3,129,781 2,153,849 3,645,087 
Restricted cash115 33,846 14,764 
Total cash, cash equivalents, and restricted cash presented in the consolidated statements of cash flows$5,143,443 $7,668,252 $9,727,289 
The following tables summarize the amortized cost, gross unrealized gains and losses, and fair value of the Company’s available-for-sale debt securities aggregated by investment category (in thousands):

December 31, 2020Classification as of December 31, 2020
Cost or
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Total
Estimated
Fair Value
Cash and
Cash
Equivalents
Marketable
Securities
Other
Assets,
Noncurrent
Funds
Receivable(2)
Certificates of deposit$421,272 $— $— $421,272 $278,281 $142,991 $— $— 
Government bonds(1)
1,924,988 65 (1)1,925,052 1,392,966 65,867 — 466,219 
Commercial paper1,021,150 — — 1,021,150 779,527 241,623 — — 
Corporate debt securities508,901 1,475 (1,635)508,741 229,633 267,618 11,490 — 
Mortgage-backed and asset-backed securities36,553 913 (113)37,353 — 37,353 — — 
Total
$3,912,864 $2,453 $(1,749)$3,913,568 $2,680,407 $755,452 $11,490 $466,219 
(1)Includes U.S. government and government agency debt securities
(2)Funds receivable and amounts held on behalf of customers
December 31, 2021Classification as of December 31, 2021
Cost or
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Total
Estimated
Fair Value
Cash and
Cash
Equivalents
Marketable
Securities
Other
Assets,
Noncurrent
Funds
Receivable(2)
Certificates of deposit$395,351 $— $— $395,351 $31,117 $364,234 $— $— 
Government bonds(1)
850 13 — 863 — 863 — — 
Commercial paper1,156,963 — — 1,156,963 163,959 993,004 — — 
Corporate debt securities917,718 220 (3,147)914,791 41,439 862,901 10,451 — 
Mortgage-backed and asset-backed securities34,019 338 (321)34,036 — 34,036 — — 
Total
$2,504,901 $571 $(3,468)$2,502,004 $236,515 $2,255,038 $10,451 $— 
(1)Includes U.S. government and government agency debt securities
(2)Funds receivable and amounts held on behalf of customers
Schedule of Depreciation and Amortization on Property and Equipment
Depreciation and amortization on property and equipment is calculated using the straight-line method over the estimated useful lives indicated below:

Asset CategoryPeriod
Computer equipment5 years
Computer software and capitalized internal-use software
1.5 to 3 years
Office furniture and equipment5 years
Buildings
25 to 40 years
Leasehold improvements
Lesser of estimated useful life or remaining lease term
Property and equipment, net, consisted of the following (in thousands):

As of December 31,
20202021
Computer equipment$55,972 $56,513 
Computer software and capitalized internal-use software163,702 175,129 
Office furniture and equipment47,596 43,169 
Leasehold improvements243,110 213,950 
Buildings and land16,844 16,844 
527,224 505,605 
Less: Accumulated depreciation and amortization(267,851)(379,194)
259,373 126,411 
Construction in progress10,821 30,174 
Total property and equipment, net$270,194 $156,585 
Payments Made To Customers
The following table summarizes total payments made to customers (in thousands):

Year Ended December 31,
201920202021
Reductions to revenue
$274,461 $384,181 $156,160 
Charges to operations and support
103,364 83,093 68,850 
Charges to sales and marketing expense
129,623 56,680 46,730 
Total payments made to customers
$507,448 $523,954 $271,740