Leases - Supplemental balance sheet information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Lease as Lessee
Operating lease right-of-use assets	$ 57,141
Operating lease liabilities	64,416
Property and equipment, at cost	3,230,428	$ 2,812,856
Accumulated amortization	(558,560)	(467,644)
Real Estate Assets, net	2,671,868	$ 2,345,212
Finance lease liabilities	45,141
Finance leased assets
Lease as Lessee
Operating lease right-of-use assets	57,141
Operating lease liabilities	64,416
Property and equipment, at cost	50,437
Accumulated amortization	(4,830)
Real Estate Assets, net	$ 45,607