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Stock based Compensation (Narrative or Textuals) (Details)
 3 Months Ended
Mar. 31, 2015
MinimumMember  
Stock Based Compensation [Line Items]  
Percentage Of Restricted Stock Shares Vesting Range 0.00%hcc_PercentageOfRestrictedStockSharesVestingRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
MaximumMember  
Stock Based Compensation [Line Items]  
Percentage Of Restricted Stock Shares Vesting Range 200.00%hcc_PercentageOfRestrictedStockSharesVestingRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember