Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Accrued capital expenditures	$ 5,200	$ 6,200
Property and Equipment
Property and equipment, at cost	3,586,667	3,388,763
Less: accumulated depreciation	(701,477)	(624,370)
Property and equipment, net	2,885,190	2,764,393
Land [Member]
Property and Equipment
Property and equipment, at cost	578,338	508,838
Land improvements [Member]
Property and Equipment
Property and equipment, at cost	7,994	7,994
Buildings [Member]
Property and Equipment
Property and equipment, at cost	2,532,599	2,427,274
Furniture, Fixtures and Equipment [Member]
Property and Equipment
Property and equipment, at cost	452,464	430,873
CIP [Member]
Property and Equipment
Property and equipment, at cost	$ 15,272	$ 13,784