Property and Equipment - Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 3,207,713	$ 3,197,067
Accumulated depreciation	(1,183,988)	(1,160,806)
Property and equipment, net	2,023,725	2,036,261
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	254,262	254,013
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	2,342,697	2,340,555
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	574,993	576,453
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 35,761	$ 26,046