Property and Equipment - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property and equipment - non-Master Leases
Property and equipment, gross	$ 2,431,177	$ 2,256,017
Less: Accumulated depreciation	(1,400,198)	(1,345,147)
Property and equipment, net	1,030,979	910,870
Property and equipment - Master Leases
Property and equipment, gross	6,816,031	2,683,277
Less: Accumulated depreciation	(978,242)	(837,478)
Property and equipment, net	5,837,789	1,845,799
Property and equipment, net	6,868,768	2,756,669
Land and improvements
Property and equipment - non-Master Leases
Property and equipment, gross	343,987	294,695
Property and equipment - Master Leases
Property and equipment, gross	2,970,969	424,700
Building, vessels and improvements
Property and equipment - non-Master Leases
Property and equipment, gross	342,944	429,015
Property and equipment - Master Leases
Property and equipment, gross	3,845,062	2,258,577
Furniture, fixtures and equipment
Property and equipment - non-Master Leases
Property and equipment, gross	1,565,830	1,385,889
Leasehold improvements
Property and equipment - non-Master Leases
Property and equipment, gross	152,943	130,801
Construction in progress
Property and equipment - non-Master Leases
Property and equipment, gross	$ 25,473	$ 15,617

Cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land or leased assets).

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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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