Leases - Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Finance lease cost
Amortization of right-of-use assets	$ 21,313	$ 61,210
Interest on lease liabilities	28,039	82,673
Total finance lease cost	49,352	143,883
Operating lease cost	57,946	164,505
Total lease cost	$ 107,298	$ 308,388