2.2.0.25falsefalse0607 - Disclosure - Borrowed Funds (Details)truefalseIn Thousands, unless otherwise specifiedfalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $ThreeMonthsEnded_31March2011http://www.sec.gov/CIK0000921847duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) $TwelveMonthsEnded_31Dec2010http://www.sec.gov/CIK0000921847duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$4true0us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseSecurities sold under agreements to repurchase:5false0hcbk_SecuritiesSoldUnderAgreementsToRepurchaseToFederalHomeLoanBankhcbkfalsecreditinstantSecurities Sold Under Agreements To Repurchase To Federal Home Loan Bank.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse13500000001350000falsetruefalsefalsefalse2truefalsefalse21500000002150000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySecurities Sold Under Agreements To Repurchase To Federal Home Loan Bank.No authoritative reference available.falsefalseFHLB, Principal6false0hcbk_WeightedAverageRateSecuritiesSoldUnderAgreementsToRepurchaseFederalHomeLoanBankhcbkfalsenainstantWeighted Average Rate Securities sold under agreements to repurchase Federal home loan bank.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.0450.045falsefalsefalsefalsefalse2truetruefalse0.04290.0429falsefalsefalsefalsefalseOtherus-types:percentItemTypepureWeighted Average Rate Securities sold under agreements to repurchase Federal home loan bank.No authoritative reference available.falsefalseFHLB, Weighted average rate7false0hcbk_SecuritiesSoldUnderAgreementsToRepurchaseToOtherBrokershcbkfalsecreditinstantSecurities Sold Under Agreements To Repurchase To Other Brokers.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse65000000006500000falsefalsefalsefalsefalse2truefalsefalse1265000000012650000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetarySecurities Sold Under Agreements To Repurchase To Other Brokers.No authoritative reference available.truefalseOther brokers, Principal8false0hcbk_WeightedAverageRateSecuritiesSoldUnderAgreementsToRepurchaseOtherBrokershcbkfalsenainstantWeighted Average Rate Securities sold under agreements to repurchase other brokers.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse0.04440.0444falsefalsefalsefalsefalse2truetruefalse0.04000.0400falsefalsefalsefalsefalseOtherus-types:percentItemTypepureWeighted Average Rate Securities sold under agreements to repurchase other brokers.No authoritative reference available.truefalseOther brokers, Weighted average rate9false0us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse78500000007850000falsefalsefalsefalsefalse2truefalsefalse1480000000014800000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe carrying value as of the balance sheet date of securities that an institution sells and agrees to repurchase (the identical or substantially the same securities) as a seller-borrower at a specified date for a specified price, also known as a repurchase agreement, or repo. Most repos involve obligations of the federal government or its agencies, but other financial instruments, such as commercial paper, banker's acceptances, and negotiable certificates of deposit, are sometimes used in repos.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 1 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 100 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 36 -IssueDate 2006-05-01 falsefalseTotal securities sold under agreements to repurchase, Principal10false0hcbk_WeightedAverageRateSecuritiesSoldUnderAgreementsToRepurchasehcbkfalsenainstantWeighted Average Rate Securities sold under agreements to repurchase.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.04450.0445falsefalsefalsefalsefalse2truetruefalse0.04040.0404falsefalsefalsefalsefalseOtherus-types:percentItemTypepureWeighted Average Rate Securities sold under agreements to repurchase.No authoritative reference available.falsefalseTotal securities sold under agreements to repurchase, Weighted average rate11false0us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranchus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse1417500000014175000falsefalsefalsefalsefalse2truefalsefalse1487500000014875000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe dollar amount of advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 15 -Paragraph 17, 37 -IssueDate 2006-05-01 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 falsefalseAdvances from the FHLB, Principal12false0us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRateus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.030.03falsefalsefalsefalsefalse2truetruefalse0.03990.0399falsefalsefalsefalsefalseOtherus-types:percentItemTypepureDescribes the weighted average interest rate applicable to the specific advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 15 -Paragraph 17, 37 -IssueDate 2006-05-01 falsefalseAdvances from the FHLB, Weighted average rate13false0hcbk_BorrowedFundshcbkfalsecreditinstantBorrowed Funds.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse2202500000022025000falsefalsefalsefalsefalse2truefalsefalse2967500000029675000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryBorrowed Funds.No authoritative reference available.truefalseTotal borrowed funds, Principal14false0hcbk_WeightedAverageRateTotalBorrowedFundshcbkfalsenainstantWeighted Average Rate Total borrowed funds.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truetruefalse0.03520.0352falsefalsefalsefalsefalse2truetruefalse0.04020.0402falsefalsefalsefalsefalseOtherus-types:percentItemTypepureWeighted Average Rate Total borrowed funds.No authoritative reference available.truefalseTotal borrowed funds, Weighted average rate15false0us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchaseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse102374000102374falsetruefalsefalsefalse2truefalsefalse151215000151215falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryGross expenses on securities sold coupled with an agreement to repurchase the same from the same counterparty at a fixed or determinable price within a fixed or variable time period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 7 -Subsection II truefalseAccrued interest payable, Principal212Borrowed Funds (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruetrue