2.2.0.7 false Consolidated Statements of Financial Condition (USD $) 0110 - Statement - Consolidated Statements of Financial Condition true false In Thousands false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ 3 Assets: 1 us-gaap_AssetsAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 4 Cash and due from banks 2 us-gaap_CashAndDueFromBanks us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 138112000 138112 [1] false false false 2 true true false false 198752000 198752 false false false xbrli:monetaryItemType monetary For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 6 -Paragraph 1, 2, 3, 7, 11 -IssueDate 2006-05-01 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1, 2, 3 -Article 9 false 5 Federal funds sold and other overnight deposits 2 hcbk_FederalFundsSoldAndOtherOvernightDeposits hcbk false debit instant Federal funds sold and other overnight deposits. false false false false false false false false false false false totallabel false 1 false true false false 180892000 180892 [1] false false false 2 false true false false 362449000 362449 false false false xbrli:monetaryItemType monetary Federal funds sold and other overnight deposits. No authoritative reference available. true 6 Total cash and cash equivalents 2 us-gaap_CashCashEquivalentsAndFederalFundsSold us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 319004000 319004 [1] false false false 2 false true false false 561201000 561201 false false false xbrli:monetaryItemType monetary The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 8, 9, 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Subsection I false 7 Securities available for sale: 2 us-gaap_AvailableForSaleSecuritiesAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 8 Mortgage-backed securities 3 hcbk_MortgageBackedSecuritiesAvailableForSale hcbk false debit instant Mortgage-backed securities. false false false false false false false false false false false verboselabel false 1 false true false false 13825644000 13825644 [1] false false false 2 false true false false 11116531000 11116531 false false false xbrli:monetaryItemType monetary Mortgage-backed securities. No authoritative reference available. false 9 Investment securities 3 us-gaap_AvailableForSaleSecurities us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 366937000 366937 [1] false false false 2 false true false false 1095240000 1095240 false false false xbrli:monetaryItemType monetary For an unclassified balance sheet, this item represents investments in debt and equity securities which are categorized neither as held-to-maturity nor trading. Such securities are reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale Security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain or loss of an Available-for-sale Security that is designated as being hedged in a fair value hedge shall be recognized in earnings during the period of the hedge, as should other than temporary declines in fair value below costs basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 16 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 14 false 10 Securities held to maturity: 2 hcbk_SecuritiesHeldToMaturityAbstract hcbk false na duration Securities held to maturity. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string Securities held to maturity. false 11 Mortgage-backed securities (fair value of $7,983,856 at June 30, 2010 and $10,324,831 at December 31, 2009) 3 hcbk_MortgageBackedSecuritiesHeldToMaturity hcbk false debit instant Mortgage backed Securities Held To Maturity false false false false false false false false false false false verboselabel false 1 false true false false 7619996000 7619996 [1] false false false 2 false true false false 9963554000 9963554 false false false xbrli:monetaryItemType monetary Mortgage backed Securities Held To Maturity No authoritative reference available. false 12 Investment securities (fair value of $5,167,785 at June 30, 2010 and $4,071,005 at December 31, 2009) 3 us-gaap_HeldToMaturitySecurities us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 5139794000 5139794 [1] false false false 2 false true false false 4187704000 4187704 false false false xbrli:monetaryItemType monetary For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity; such investments are measured at amortized cost (carrying value). The held-to-maturity category is for those securities that the Entity has the positive intent and ability to hold until maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 3 -Section A -Paragraph 4, 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 17 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 7, 8, 9, 10, 11 true 13 Total securities 2 us-gaap_MarketableSecurities us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 26952371000 26952371 [1] false false false 2 false true false false 26363029000 26363029 false false false xbrli:monetaryItemType monetary Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 false 14 Loans 2 us-gaap_LoansAndLeasesReceivableConsumerMortgage us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 32164303000 32164303 [1] false false false 2 false true false false 31779921000 31779921 false false false xbrli:monetaryItemType monetary Reflects the gross carrying amount of unpaid loans issued to individuals to acquire or improve land or a building or to provide cash to the borrower, and which are secured by the acquired or improved realty. Loans secured by one to four-family residential property of the borrower are generally referred to as residential mortgage loans. Repayment terms for residential mortgage loans may vary considerably. Such loans may be structured to provide for full amortization of principal, partial amortization with a balloon payment at a specified date, or negative amortization. Interest rates may be fixed or variable. This item excludes subordinated loans such as home equity lines of credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 8 -Paragraph 40, 41 -IssueDate 2006-05-01 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph a, b -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph c(i) -Subsection I false 15 Net deferred loan costs 2 us-gaap_LoansAndLeasesReceivableDeferredIncome us-gaap true credit instant No definition available. false false false false false false false false false false true negated false 1 false true false false 91509000 91509 [1] false false false 2 false true false false 81307000 81307 false false false xbrli:monetaryItemType monetary Reflects the cumulative amount of interest and fees paid by borrowers which have not yet been taken into income in conformity with GAAP. Also reflects the amount of unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans that are being amortized into income as an adjustment to yield. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph e -Subsection I Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph a(i-v) -Subsection I Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph f -Subsection I Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 23 -Subparagraph a(i)(d) false 16 Allowance for loan losses 2 us-gaap_LoansAndLeasesReceivableAllowance us-gaap true credit instant No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -192983000 -192983 [1] false false false 2 false true false false -140074000 -140074 false false false xbrli:monetaryItemType monetary The allowance for loan and lease losses represents the reserve to cover probable credit losses related to specifically identified loans and leases, as well as probable credit losses inherent in the remainder of the loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for loan losses in connection with business combinations determined to be appropriate. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 8 -Subparagraph a(ii) -Subsection I Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 8, 9 true 17 Net loans 2 us-gaap_LoansAndLeasesReceivableNetReportedAmount us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 32062829000 32062829 [1] false false false 2 false true false false 31721154000 31721154 false false false xbrli:monetaryItemType monetary Reflects the aggregate carrying amount of all categories of loans and leases held in portfolio, net of unearned income and the allowance for losses on loans and leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e false 18 Federal Home Loan Bank of New York stock 2 us-gaap_FederalHomeLoanBankStock us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 883190000 883190 [1] false false false 2 false true false false 874768000 874768 false false false xbrli:monetaryItemType monetary Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 12 -Paragraph 26 -IssueDate 2006-05-01 false 19 Foreclosed real estate, net 2 us-gaap_RealEstateAcquiredThroughForeclosure us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 21690000 21690 [1] false false false 2 false true false false 16736000 16736 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph f Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 11 -Paragraph 2, 9, 10, 11 -IssueDate 2006-05-01 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 false 20 Accrued interest receivable 2 us-gaap_AccruedInvestmentIncomeReceivable us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 283550000 283550 [1] false false false 2 false true false false 304091000 304091 false false false xbrli:monetaryItemType monetary Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 7 false 21 Banking premises and equipment, net 2 us-gaap_PropertyPlantAndEquipmentNet us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 70617000 70617 [1] false false false 2 false true false false 70116000 70116 false false false xbrli:monetaryItemType monetary Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, and production equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 12 -Paragraph 5 -Subparagraph b, c Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 false 22 Goodwill 2 us-gaap_Goodwill us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 152109000 152109 [1] false false false 2 false true false false 152109000 152109 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date, which is the cumulative amount paid, adjusted for any amortization recognized prior to adoption of FAS 142 and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 43 false 23 Other assets 2 us-gaap_OtherAssets us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 187774000 187774 [1] false false false 2 false true false false 204556000 204556 false false false xbrli:monetaryItemType monetary Carrying amount as of the balance sheet date of assets not otherwise specified in the taxonomy. Also serves as the sum of assets not individually reported in the financial statements, or not separately disclosed in notes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 7 true 24 Total Assets 2 us-gaap_Assets us-gaap true debit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 60933134000 60933134 [1] false false false 2 false true false false 60267760000 60267760 false false false xbrli:monetaryItemType monetary Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Concepts (CON) -Number 6 -Paragraph 25 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 true 26 Deposits: 2 us-gaap_DepositsAbstract us-gaap true na duration No definition available. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 27 Interest-bearing 3 us-gaap_InterestBearingDepositLiabilities us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 24553676000 24553676 [1] false false false 2 false true false false 23992007000 23992007 false false false xbrli:monetaryItemType monetary The aggregate of all domestic and foreign interest-bearing deposit liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 false 28 Noninterest-bearing 3 us-gaap_NoninterestBearingDepositLiabilities us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 614789000 614789 [1] false false false 2 false true false false 586041000 586041 false false false xbrli:monetaryItemType monetary The aggregate amount of all domestic and foreign noninterest-bearing deposits liabilities held by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 true 29 Total deposits 3 us-gaap_Deposits us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 25168465000 25168465 [1] false false false 2 false true false false 24578048000 24578048 false false false xbrli:monetaryItemType monetary The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 13 -Paragraph 37, 38, 39 -IssueDate 2006-05-01 false 30 Repurchase agreements 2 us-gaap_SecuritiesSoldUnderAgreementsToRepurchase us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 15100000000 15100000 [1] false false false 2 false true false false 15100000000 15100000 false false false xbrli:monetaryItemType monetary The 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 false 31 Federal Home Loan Bank of New York advances 2 us-gaap_FederalHomeLoanBankAdvancesShortTerm us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 14875000000 14875000 [1] false false false 2 false true false false 14875000000 14875000 false false false xbrli:monetaryItemType monetary Federal Home Loan Bank borrowings due within one year of the latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 15, 18 -Subsection I Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Chapter 15 -Paragraph 37 -IssueDate 2006-05-01 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph f Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 true 32 Total borrowed funds 2 hcbk_TotalBorrowedFunds hcbk false credit instant Total borrowed funds false false false false false false false false false false false verboselabel false 1 false true false false 29975000000 29975000 [1] false false false 2 false true false false 29975000000 29975000 false false false xbrli:monetaryItemType monetary Total borrowed funds No authoritative reference available. false 33 Due to brokers 2 us-gaap_OtherPayablesToBrokerDealersAndClearingOrganizations us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0 0 [1] false false false 2 false true false false 100000000 100000 false false false xbrli:monetaryItemType monetary Other amounts due but not specifically defined in the taxonomy to other broker-dealers or clearing organizations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-8, 4 -IssueDate 2006-05-01 false 34 Accrued expenses and other liabilities 2 hcbk_AccruedExpensesAndOtherLiabilities hcbk false credit instant Accrued expenses and other liabilities. false false false false false false false false false false false totallabel false 1 false true false false 246413000 246413 [1] false false false 2 false true false false 275560000 275560 false false false xbrli:monetaryItemType monetary Accrued expenses and other liabilities. No authoritative reference available. true 35 Total liabilities 2 us-gaap_Liabilities us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 55389878000 55389878 [1] false false false 2 false true false false 54928608000 54928608 false false false xbrli:monetaryItemType monetary Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. No authoritative reference available. true 36 Common stock, $0.01 par value, 3,200,000,000 shares authorized; 741,466,555 shares issued; 526,611,096 shares outstanding at June 30, 2010 and 526,493,676 shares outstanding at December 31, 2009 2 us-gaap_CommonStockValue us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 7415000 7415 [1] false false false 2 false true false false 7415000 7415 false false false xbrli:monetaryItemType monetary Dollar value of issued common stock whether issued at par value, no par or stated value. This item includes treasury stock repurchased by the entity. Note: elements for number of common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 false 37 Additional paid-in capital 2 us-gaap_AdditionalPaidInCapital us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 4694235000 4694235 [1] false false false 2 false true false false 4683414000 4683414 false false false xbrli:monetaryItemType monetary Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of APIC associated with common AND preferred stock. For APIC associated with only common stock, use the element Additional Paid In Capital, Common Stock. For APIC associated with only preferred stock, use the element Additional Paid In Capital, Preferred Stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 false 38 Retained earnings 2 us-gaap_RetainedEarningsAccumulatedDeficit us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 2544987000 2544987 [1] false false false 2 false true false false 2401606000 2401606 false false false xbrli:monetaryItemType monetary The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 false 39 Treasury stock, at cost; 214,855,459 shares at June 30, 2010 and 214,972,879 shares at December 31, 2009 2 us-gaap_TreasuryStockValue us-gaap true debit instant No definition available. false false false false false false false false false false true negated false 1 false true false false -1726808000 -1726808 [1] false false false 2 false true false false -1727579000 -1727579 false false false xbrli:monetaryItemType monetary Value of common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. Treasury stock is issued but is not outstanding. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Note: number of treasury shares concept is in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Technical Bulletin (FTB) -Number 85-6 -Paragraph 3 false 40 Unallocated common stock held by the employee stock ownership plan 2 us-gaap_TreasuryStockDeferredEmployeeStockOwnershipPlan us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -207234000 -207234 [1] false false false 2 false true false false -210237000 -210237 false false false xbrli:monetaryItemType monetary The issuance of shares or sale of treasury shares to an Employee Stock Ownership Plan (ESOP). Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 13 false 41 Accumulated other comprehensive income, net of tax 2 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 230661000 230661 [1] false false false 2 false true false false 184533000 184533 false false false xbrli:monetaryItemType monetary Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at fiscal year-end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, and unrealized gains and losses on certain investments in debt and equity securities as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 14, 17, 26 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 true 42 Total shareholders' equity 2 us-gaap_StockholdersEquity us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 false true false false 5543256000 5543256 [1] false false false 2 false true false false 5339152000 5339152 false false false xbrli:monetaryItemType monetary Total of all Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A3 -Appendix A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 true 43 Total Liabilities and Shareholders' Equity 2 us-gaap_LiabilitiesAndStockholdersEquity us-gaap true credit instant No definition available. false false false false false false false false false false false totallabel false 1 true true false false 60933134000 60933134 [1] false false false 2 true true false false 60267760000 60267760 false false false xbrli:monetaryItemType monetary Total of all Liabilities and Stockholders' Equity items. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 32 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 25 -Article 7 true 1 Unaudited 2 40 false Thousands UnKnown UnKnown false true