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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]  
Schedule of Cash and Cash Equivalents The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the unaudited consolidated balance sheets to the unaudited consolidated statements of cash flows.
(In thousands)September 30, 2020December 31, 2019September 30, 2019
Cash and cash equivalents$865,609 $788,072 $416,603 
Restricted cash8,926 7,936 11,002 
Total Cash, cash equivalents and restricted cash$874,535 $796,008 $427,605 
Schedule of Accounts Receivable and Prepaid Expense and Other Current Assets Allowance for Doubtful Accounts
(In thousands)Balance as of
June 30, 2020		Charged to
Costs and
Expenses		Write-Offs
Net of
Recoveries		Balance as of
September 30, 2020
Allowance for doubtful accounts -
accounts receivable, net		$29,658 $(1,103)$(154)$28,401 
Allowance for doubtful accounts -
prepaid expenses and other current assets		$7,359 $9 $— $7,368 

(In thousands)Balance as of December 31, 2019Charged to
Costs and
Expenses		Write-Offs
Net of
Recoveries		Balance as of
September 30, 2020
Allowance for doubtful accounts -
accounts receivable, net		$15,083 $13,504 $(186)$28,401 
Allowance for doubtful accounts -
prepaid expenses and other current assets		$— $7,368 $— $7,368