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Fair Value Measurement (Details Textual) (USD $)
 6 Months Ended
Jun. 30, 2014
Sellers
Dec. 31, 2013
Fair Value Measurement (Textual)    
Interest rate swap, notional amount $ 120,300,000  
Carrying value of the debt 120,313,000  
Deferred payment arrangement number of sellers 1  
Fair value assets and liabilities hierarchy level transfers amount      
Fair Value, Measurements, Nonrecurring [Member]
    
Fair Value Measurement (Textual)    
Assets measured at fair value on a non-recurring basis, goodwill 6,800,000 6,800,000
Assets measured at fair value on a non-recurring basis, other indefinite-lived intangible assets $ 1,600,000 $ 1,600,000