Intangible Franchise Rights and Goodwill (Details) (USD $)	6 Months Ended
	Jun. 30, 2013
Goodwill [Line Items]
Goodwill, Subsequent Recognition of Deferred Tax Asset	$ (67,000)
Intangible Franchise Rights
Beginning Balance	196,058,000
Additions through acquisitions	95,304,000
Disposition of Intangible Franchise Rights	(5,826,000)
Currency Translation	(10,563,000)
Ending Balance	274,973,000
Goodwill
Beginning Balance	582,384,000	[1]
Additions through acquisitions	115,526,000
Dispositions of Goodwill	(4,728,000)
Currency translation	(12,258,000)	[1]
Ending Balance	680,857,000
Accumulated Impairments	$ 40,300,000

[1] Net of accumulated impairment of $40.3 million