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Other Intangible, Net and Goodwill (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Change In Gross Amount of Identifiable Intangible Assets $ 0htld_IncreaseDecreaseinIntangibleAssetsNonCurrent  
Finite-Lived Intangible Assets, Amortization Expense 626,000us-gaap_AmortizationOfIntangibleAssets 591,000us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets [Line Items]    
Gross Amount 19,042,000us-gaap_FiniteLivedIntangibleAssetsGross  
Accumulated Amortization 3,288,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization  
Net Intangible Assets 15,754,000us-gaap_FiniteLivedIntangibleAssetsNet  
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 20 years  
Gross Amount 7,600,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Accumulated Amortization 523,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Net Intangible Assets 7,077,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
 
Tradename    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 6 years  
Gross Amount 7,400,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
Accumulated Amortization 1,696,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
Net Intangible Assets 5,704,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
Covenants Not to Compete    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 10 years  
Gross Amount 3,100,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
 
Accumulated Amortization 429,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
 
Net Intangible Assets 2,671,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
 
Real Estate Options    
Finite-Lived Intangible Assets [Line Items]    
Amortization period (years) 2 years 2 months 12 days  
Gross Amount 942,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_RealEstateMember
 
Accumulated Amortization 640,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_RealEstateMember
 
Net Intangible Assets $ 302,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_RealEstateMember