Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land and improvements	$ 207,405	$ 127,221
Buildings and improvements	3,443,791	3,048,836
Equipment and software	360,168	326,603
Office furniture and fixtures	35,018	30,884
Construction in progress	30,401	276,508
Property and equipment, gross	4,076,783	3,810,052
Less: Accumulated depreciation	(1,193,723)	(1,151,424)
Property, and Equipment, total	$ 2,883,060	$ 2,658,628