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Goodwill and Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]    
Historical Cost $ 60,931 $ 60,931
Accumulated Amortization (20,153) (13,178)
Net Balance 40,778 47,753
Customer relationships
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life 9 years 0 months 9 years 0 months
Historical Cost 53,957 53,957
Accumulated Amortization (17,234) (11,237)
Net Balance 36,723 42,720
Trade names and trademarks
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life 10 years 0 months 10 years 0 months
Historical Cost 5,300 5,300
Accumulated Amortization (1,590) (1,060)
Net Balance 3,710 4,240
Non-compete agreements
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Historical Cost 1,674 1,674
Accumulated Amortization (1,329) (881)
Net Balance $ 345 $ 793
Minimum | Non-compete agreements
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life 2 years 6 months  
Maximum | Non-compete agreements
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Useful Life 5 years