Additional Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The cash, cash equivalents and restricted cash at the beginning and ending of each period presented in the Company’s condensed consolidated statements of cash flows consisted of the following:



	Nine Months Ended September 30,
	2019				2018
	Beginning of period		End of period		Beginning of period		End of period
	(in thousands)
Cash and cash equivalents	$	2,650,134	$	3,397,941	$	1,665,412	$	2,478,302
Prepaid expenses and other current assets	4,910		6,650		2,114		8,749
Other assets	3,209		—		—		—
Cash, cash equivalents and restricted cash per statement of cash flows	$	2,658,253	$	3,404,591	$	1,667,526	$	2,487,051

Lease, Supplemental Cash Flow Information

Supplemental cash flow information related to the Company’s leases was as follows:



	Nine Months Ended September 30, 2019
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	8,062
Operating cash flows from finance leases	$	37,667
Financing cash flows from finance leases	$	28,879

Right-of-use assets obtained in exchange for lease obligations
Operating leases **	$	6,077
Finance leases	$	—
** Includes $5.4 million acquired in July 2019 pursuant to the Company’s acquisition of Exonics.