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Intangible Assets (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Remaining Useful Life (in Years) 14 years 11 months 26 days   15 years 4 months 10 days
Gross Carrying Amount $ 327,951,000   $ 327,951,000
Accumulated Amortization 23,060,000   17,412,000
Intangible assets amortization expense 5,600,000 800,000  
Customer Relationships
      
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Remaining Useful Life (in Years) 15 years 0 months 14 days   15 years 4 months 28 days
Gross Carrying Amount 306,361,000   306,361,000
Accumulated Amortization 21,604,000   16,509,000
Trademarks and Trade Names
      
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Remaining Useful Life (in Years) 14 years 3 months 4 days   14 years 8 months 16 days
Gross Carrying Amount 21,370,000   21,370,000
Accumulated Amortization 1,334,000   794,000
Other Intangible Assets
      
Finite-Lived Intangible Assets [Line Items]      
Weighted Average Remaining Useful Life (in Years) 2 years 10 months 24 days   3 years
Gross Carrying Amount 220,000   220,000
Accumulated Amortization $ 122,000   $ 109,000