Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment	$ 637,292	$ 611,739
Less: accumulated depreciation	(140,674)	(131,969)
Property and equipment, net	496,618	479,770
Land
Property, Plant and Equipment [Line Items]
Property and equipment	80,439	79,679
Building and improvements
Property, Plant and Equipment [Line Items]
Property and equipment	394,502	379,021
Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	105,389	97,984
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	9,056	8,851
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment	45,867	44,123
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment	$ 2,039	$ 2,081