Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	$ 762,864	$ 677,907
Less - accumulated depreciation and amortization	(314,498)	(274,463)
Total property and equipment, net	448,366	403,444
Land [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	58,545	56,162
Buildings and improvements [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	142,099	137,614
Leasehold improvements [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	176,487	140,944
Furniture and equipment [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	272,820	243,429
Software [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	42,524	32,676
Buildings held under capital leases [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	59,555	30,550
Equipment held under capital leases [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	835	849
Less - accumulated depreciation and amortization	(13,700)	(10,500)
Construction in Progress [Member]
Property, Plant and Equipment, Net, by Type [Abstract]
Total property and equipment	$ 9,999	$ 35,683