Property and Equipment - Property and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 3,288,956	$ 3,239,135
Accumulated depreciation	(1,304,921)	(1,256,319)
Property and equipment, net	1,984,035	1,982,816
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	263,170	255,179
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	2,381,759	2,369,851
Furniture, fixtures and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	612,000	603,529
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property and Equipment, gross	$ 32,027	$ 10,576