Goodwill and Other Long-Lived Assets (Details 1) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 165,596	$ 147,685
Accumulated Amortization	(66,688)	(59,510)
Total intangible assets	98,908	88,175
Non-contractual customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	118,231	101,056
Accumulated Amortization	(50,879)	(45,295)
Total intangible assets	67,352	55,761
Covenants not-to-compete [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,772	10,093
Accumulated Amortization	(5,072)	(4,422)
Total intangible assets	6,700	5,671
Favorable lease asset [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,477	9,576
Accumulated Amortization	(5,191)	(4,962)
Total intangible assets	4,286	4,614
Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	100	100
Accumulated Amortization	(28)	(11)
Total intangible assets	72	89
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,627	1,627
Accumulated Amortization	(584)	(414)
Total intangible assets	1,043	1,213
Franchise rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,730	11,730
Accumulated Amortization	(977)	(391)
Total intangible assets	10,753	11,339
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,659	13,503
Accumulated Amortization	(3,957)	(4,015)
Total intangible assets	$ 8,702	$ 9,488