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Property and Equipment - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property and Equipment
Property and equipment	$ 200,728	$ 1,154,223
Less accumulated depreciation and amortization	(89,689)	(231,939)
Property and equipment, net	111,039	922,284
Depreciation and amortization expense	35,525	53,607	$ 44,829
Land
Property and Equipment
Property and equipment	5,579	160,126
Land Improvements
Property and Equipment
Property and equipment	2,242	25,630
Buildings
Property and Equipment
Property and equipment	51,409	595,384
Buildings and Leasehold Improvements
Property and Equipment
Property and equipment	9,581	117,460
Equipment under Capital Leases
Property and Equipment
Property and equipment		5,937
Computer Equipment [Member]
Property and Equipment
Property and equipment	85,316	116,477
Furniture, Fixtures and Equipment [Member]
Property and Equipment
Property and equipment	4,955	63,470
Internally Developed Software
Property and Equipment
Property and equipment	39,270	36,173
Other
Property and Equipment
Property and equipment		1,176
Construction in Progress
Property and Equipment
Property and equipment	$ 2,376	$ 32,390

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- Definition

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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