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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 5) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
item
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting      
Number of Operating Segments 2us-gaap_NumberOfOperatingSegments    
Number of Reportable Segments 1us-gaap_NumberOfReportableSegments    
Self-insurance Reserves      
Period for reviewing actual expenditure to determine self-insurance reserve 12 months    
Capitalized Interest      
Interest Costs Capitalized $ 152us-gaap_InterestCostsCapitalized $ 0us-gaap_InterestCostsCapitalized $ 0us-gaap_InterestCostsCapitalized
Customer Relationships [Member]      
Finite-lived intangible assets      
Net intangible asset $ 7,400us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
$ 8,500us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember