Property and Equipment - Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 3,197,067	$ 3,144,970
Accumulated depreciation	(1,160,806)	(1,076,973)
Property and equipment, net	2,036,261	2,067,997
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	254,013	242,418
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	2,340,555	2,300,499
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	576,453	576,209
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 26,046	$ 25,844