XML 118 R58.htm IDEA: XBRL DOCUMENT v2.4.1.9
Shareholder's Equity (Detail Textuals) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Stockholders' Equity Note [Abstract]      
Treasury stock shares acquired 4,710hcc_TreasuryStockSharesAcquiredFootnote 1,055hcc_TreasuryStockSharesAcquiredFootnote 5,567hcc_TreasuryStockSharesAcquiredFootnote
Treasury stock value acquired cost method $ 224,706,000hcc_TreasuryStockValueAcquiredCostMethodFootnote $ 42,212,000hcc_TreasuryStockValueAcquiredCostMethodFootnote $ 178,669,000hcc_TreasuryStockValueAcquiredCostMethodFootnote
Treasury Stock Acquired Average Cost Per Share $ 47.7us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 40.02us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 32.09us-gaap_TreasuryStockAcquiredAverageCostPerShare
Statutory Accounting Practices Statutory Amount Available For Dividend Payments 235,200,000us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments    
Adjustments To Additional Paid In Capital Other     $ 14,400,000us-gaap_AdjustmentsToAdditionalPaidInCapitalOther