Property and Equipment - Schedule of Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property and Equipment
Gross property and equipment	$ 492,509	$ 457,944
Less: accumulated depreciation	(293,926)	(267,614)
Property and equipment, net	198,583	190,330
Land and land interests
Property and Equipment
Gross property and equipment	30,707	23,646
Buildings and leasehold improvements
Property and Equipment
Gross property and equipment	139,083	139,889
Equipment and other
Property and Equipment
Gross property and equipment	$ 322,719	$ 294,409