Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,904,785	$ 1,141,263
Short-term investments	1,885,385	1,280,989
Accounts receivable, net of allowance for doubtful accounts of $2,739 and $4,522 at September 30, 2020 and December 31, 2019, respectively	79,642	67,005
Mortgage loans held for sale	125,324	36,507
Inventory	193,283	836,627
Prepaid expenses and other current assets	73,604	58,117
Restricted cash	44,103	89,646
Total current assets	4,306,126	3,510,154
Contract cost assets	50,488	45,209
Property and equipment, net	198,243	170,489
Right of use assets	193,789	212,153
Goodwill	1,984,907	1,984,907
Intangible assets, net	100,649	190,567
Other assets	9,373	18,494
Total assets	6,843,575	6,131,973
Current liabilities:
Accounts payable	19,352	8,343
Accrued expenses and other current liabilities	93,901	85,442
Accrued compensation and benefits	35,474	37,805
Borrowings under credit facilities	232,397	721,951
Deferred revenue	49,153	39,747
Lease liabilities, current portion	28,307	17,592
Convertible senior notes, current portion	7,584	9,637
Total current liabilities	466,168	920,517
Lease liabilities, net of current portion	214,503	220,445
Convertible senior notes, net of current portion	1,838,010	1,543,402
Deferred tax liabilities and other long-term liabilities	21,539	12,188
Total liabilities	2,540,220	2,696,552
Commitments and contingencies (Note 16)
Shareholders’ equity:
Preferred stock, $0.0001 par value; 30,000,000 shares authorized; no shares issued and outstanding	0	0
Additional paid-in capital	5,488,161	4,412,200
Accumulated other comprehensive income	461	340
Accumulated deficit	(1,185,291)	(977,140)
Total shareholders’ equity	4,303,355	3,435,421
Total liabilities and shareholders’ equity	6,843,575	6,131,973
Class A Common Stock
Shareholders’ equity:
Common stock/capital stock	6	6
Class B Common Stock
Shareholders’ equity:
Common stock/capital stock	1	1
Class C Capital Stock
Shareholders’ equity:
Common stock/capital stock	$ 17	$ 14