Leases - Schedule of supplemental cash flow information related to leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Decrease in right-of-use assets related to lease modification	$ 42,058	$ 21,386
Decrease in operating lease liabilities due to lease modification	41,177	23,499
Cash paid for amounts included in the measurement of lease liabilities (in thousands)	$ 1,887	$ 4,249
Weighted-average remaining lease term of operating leases (in years)		9 years
Weighted-average discount rate of operating leases		9.70%