Leases - Other additional information related to operating lease liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities - operating cash flows:	$ 56,896	$ 51,980
Right-of-use operating lease assets obtained in exchange for operating lease liabilities	$ 436,587	$ 8,759
Weighted average remaining lease term	7 years		13 years
Weighted average discount rate	1.69%		3.71%