Business Segments and Geographic Information Geographic Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 31, 2013		Dec. 31, 2012		Jan. 01, 2012
Geographical Information
Revenues	$ 383,548		$ 379,842	$ 381,653	$ 377,031	$ 378,731	[1]	$ 369,115	$ 371,174	$ 360,042	$ 1,522,074		$ 1,479,062		$ 1,407,172
Property and equipment, net	1,727,798	[2]				1,687,159	[2]				1,727,798	[2]	1,687,159	[2]
U.S. operations
Geographical Information
Revenues											1,313,912		1,266,670		1,205,179
Property and equipment, net	1,721,761					1,680,038					1,721,761		1,680,038
Australia operations
Geographical Information
Revenues											158,028		159,444		150,753
Property and equipment, net	4,828					5,634					4,828		5,634
South African operations
Geographical Information
Revenues											17,992		20,029		21,357
Property and equipment, net	158					234					158		234
United Kingdom operations
Geographical Information
Revenues											31,629		32,254		29,287
Property and equipment, net	1,051					1,253					1,051		1,253
CANADA
Geographical Information
Revenues											$ 513		$ 665		$ 596

[1] In the Fourth Quarter of 2012, the Company completed a corporate restructuring in order to operate as a REIT effective January 1, 2013. In connection with the REIT conversion, the Company divested one of its operating segments, RTS, and recorded a loss of $14.6 million, net of tax. Refer to Note 2 - Discontinued Operations for additional information. Also, as a result of the REIT restructuring, the Company recorded an income tax benefit of approximately $79.0 million related to the reversal of certain net deferred tax liabilities. Refer to Note 17 - Income Taxes for additional information.

[2] As of December 31, 2013 and 2012 Canada did not have any significant long-lived assets.