Summary of Significant Accounting Policies (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Other Intangible Assets
Gross Carrying Amount	$ 147,685	$ 145,156
Accumulated Amortization	(59,510)	(58,485)
Total intangible assets	88,175	86,671
Customer Relationships [Member]
Other Intangible Assets
Gross Carrying Amount	101,056	109,842
Accumulated Amortization	(45,295)	(41,895)
Total intangible assets	55,761	67,947
Non Compete Agreements [Member]
Other Intangible Assets
Gross Carrying Amount	10,093	8,843
Accumulated Amortization	(4,422)	(4,661)
Total intangible assets	5,671	4,182
Favorable lease asset [Member]
Other Intangible Assets
Gross Carrying Amount	9,576	7,458
Accumulated Amortization	(4,962)	(4,373)
Total intangible assets	4,614	3,085
Technology [Member]
Other Intangible Assets
Gross Carrying Amount	1,627	5,240
Accumulated Amortization	(414)	(3,015)
Total intangible assets	1,213	2,225
Trademarks [Member]
Other Intangible Assets
Gross Carrying Amount	13,503	13,115
Accumulated Amortization	(4,015)	(4,194)
Total intangible assets	9,488	8,921
Contracts [Member]
Other Intangible Assets
Gross Carrying Amount	100	608
Accumulated Amortization	(11)	(305)
Total intangible assets	89	303
Client lists [Member]
Other Intangible Assets
Gross Carrying Amount	0	50
Accumulated Amortization	0	(42)
Total intangible assets	0	8
Franchise rights [Member]
Other Intangible Assets
Gross Carrying Amount	11,730	0
Accumulated Amortization	(391)	0
Total intangible assets	$ 11,339	$ 0