Goodwill and Intangible Assets (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets
Licenses, gross	$ 226,955,000	$ 226,706,000
Intangible assets
Gross	354,682,000	335,062,000
Accumulated Amortization	21,069,000	13,769,000
Amortization expenses	7,300,000	6,700,000	6,200,000
Estimated amortization expense
2014	8,989,000
2015	8,633,000
2016	8,175,000
2017	7,566,000
2018	6,933,000
Minimum
Intangible assets
Life	2 years
Maximum
Intangible assets
Life	20 years
Trade names
Intangible assets
Gross	63,933,000	63,060,000
Accumulated Amortization	10,272,000	6,824,000
Trade names | Minimum
Intangible assets
Life	5 years
Trade names | Maximum
Intangible assets
Life	20 years
Customer relationships
Intangible assets
Gross	57,296,000	40,479,000
Accumulated Amortization	7,993,000	4,855,000
Customer relationships | Minimum
Intangible assets
Life	15 years
Customer relationships | Maximum
Intangible assets
Life	20 years
Covenants not to compete
Intangible assets
Gross	5,747,000	4,069,000
Accumulated Amortization	2,420,000	1,831,000
Covenants not to compete | Minimum
Intangible assets
Life	2 years
Covenants not to compete | Maximum
Intangible assets
Life	5 years
Other intangible assets
Intangible assets
Gross	751,000	748,000
Accumulated Amortization	$ 384,000	$ 259,000
Other intangible assets | Minimum
Intangible assets
Life	5 years
Other intangible assets | Maximum
Intangible assets
Life	20 years