Summary of Significant Accounting Policies (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Intangible Assets
Gross Carrying Amount	$ 145,156	$ 150,427
Accumulated Amortization	(58,485)	(55,604)
Other intangible assets, net	86,671	94,823
Customer Relationships [Member]
Other Intangible Assets
Gross Carrying Amount	109,842	110,404
Accumulated Amortization	(41,895)	(36,605)
Other intangible assets, net	67,947	73,799
Non Compete Agreements [Member]
Other Intangible Assets
Gross Carrying Amount	8,843	12,707
Accumulated Amortization	(4,661)	(7,357)
Other intangible assets, net	4,182	5,350
Favorable lease asset [Member]
Other Intangible Assets
Gross Carrying Amount	7,458	7,228
Accumulated Amortization	(4,373)	(3,866)
Other intangible assets, net	3,085	3,362
Technology [Member]
Other Intangible Assets
Gross Carrying Amount	5,240	6,588
Accumulated Amortization	(3,015)	(4,179)
Other intangible assets, net	2,225	2,409
Trademarks [Member]
Other Intangible Assets
Gross Carrying Amount	13,115	12,494
Accumulated Amortization	(4,194)	(3,001)
Other intangible assets, net	8,921	9,493
Contracts [Member]
Other Intangible Assets
Gross Carrying Amount	608	956
Accumulated Amortization	(305)	(570)
Other intangible assets, net	303	386
Client lists [Member]
Other Intangible Assets
Gross Carrying Amount	50	50
Accumulated Amortization	(42)	(26)
Other intangible assets, net	$ 8	$ 24