Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Gross property and equipment	$ 659,925	$ 606,338
Accumulated depreciation	(327,920)	(300,767)
Property and equipment, net	332,005	305,571
Land and land interests
Property Plant And Equipment [Line Items]
Gross property and equipment	33,349	32,544
Buildings and leasehold improvements
Property Plant And Equipment [Line Items]
Gross property and equipment	248,873	222,118
Equipment and other
Property Plant And Equipment [Line Items]
Gross property and equipment	$ 377,703	$ 351,676

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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