Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,045,474	$ 1,141,263
Short-term investments	1,491,167	1,280,989
Accounts receivable, net of allowance for doubtful accounts of $2,282 and $4,522 at June 30, 2020 and December 31, 2019, respectively	66,878	67,005
Mortgage loans held for sale	75,021	36,507
Inventory	135,401	836,627
Prepaid expenses and other current assets	56,373	58,117
Restricted cash	33,620	89,646
Total current assets	3,903,934	3,510,154
Contract cost assets	47,747	45,209
Property and equipment, net	195,747	170,489
Right of use assets	199,422	212,153
Goodwill	1,984,907	1,984,907
Intangible assets, net	106,990	190,567
Other assets	11,041	18,494
Total assets	6,449,788	6,131,973
Current liabilities:
Accounts payable	14,307	8,343
Accrued expenses and other current liabilities	74,646	85,442
Accrued compensation and benefits	34,520	37,805
Borrowings under credit facilities	187,032	721,951
Deferred revenue	44,514	39,747
Lease liabilities, current portion	22,789	17,592
Convertible senior notes, current portion	9,637	9,637
Total current liabilities	387,445	920,517
Lease liabilities, net of current portion	214,752	220,445
Convertible senior notes, net of current portion	1,810,341	1,543,402
Deferred tax liabilities and other long-term liabilities	14,192	12,188
Total liabilities	2,426,730	2,696,552
Commitments and contingencies (Note 17)
Shareholders’ equity:
Preferred stock, $0.0001 par value; 30,000,000 shares authorized; no shares issued and outstanding	0	0
Additional paid-in capital	5,246,371	4,412,200
Accumulated other comprehensive income	1,525	340
Accumulated deficit	(1,224,861)	(977,140)
Total shareholders’ equity	4,023,058	3,435,421
Total liabilities and shareholders’ equity	6,449,788	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	$ 16	$ 14