Additional Cash Flow Information (Tables)

6 Months Ended

Jun. 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:



	Six Months Ended June 30,
	2019				2018
	Beginning of period		End of period		Beginning of period		End of period
	(in thousands)
Cash and cash equivalents	$	2,650,134	$	3,294,684	$	1,665,412	$	2,145,359
Prepaid expenses and other current assets	4,910		6,962		2,114		8,709
Other assets	3,209		—		—		—
Cash, cash equivalents and restricted cash per statement of cash flows	$	2,658,253	$	3,301,646	$	1,667,526	$	2,154,068

Lease, Supplemental Cash Flow Information

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



	Six Months Ended June 30, 2019
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	5,055
Operating cash flows from finance leases	$	24,635
Financing cash flows from finance leases	$	18,926

Right-of-use assets obtained in exchange for lease obligations
Operating leases	$	—
Finance leases	$	—