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Goodwill and Intangible Assets Components of Other Intangible Assets (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Useful Life (in Years) 15 years 4 months 10 days 16 years 5 months 13 days  
Gross Carrying Amount $ 327,951,000 $ 49,251,000  
Accumulated Amortization 17,412,000 10,968,000  
Intangible asset amortization expense 6,400,000 3,100,000 1,400,000
Estimated Future Intangible Amortization Expense      
2014 22,100,000    
2015 22,000,000    
2016 21,900,000    
2017 21,900,000    
2018 21,700,000    
Customer Relationships
      
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Useful Life (in Years) 15 years 4 months 28 days 16 years 8 months 12 days  
Gross Carrying Amount 306,361,000 48,261,000  
Accumulated Amortization 16,509,000 10,663,000  
Trademarks and Trade Names
      
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Useful Life (in Years) 14 years 8 months 16 days 2 years 7 months 6 days  
Gross Carrying Amount 21,370,000 770,000  
Accumulated Amortization 794,000 248,000  
Other Intangible Assets
      
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Useful Life (in Years) 3 years 3 years 8 months 12 days  
Gross Carrying Amount 220,000 220,000  
Accumulated Amortization $ 109,000 $ 57,000