2.4.0.8132 - Disclosure - Components of Carrying Value of Available-For-Sale Agency Securities (Detail)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$eol_PE763517--1310-Q0007_STD_0_20130630_0http://www.sec.gov/CIK0001419521instant2013-06-30T00:00:000001-01-01T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$eol_PE763517--1310-Q0007_STD_0_20121231_0http://www.sec.gov/CIK0001419521instant2012-12-31T00:00:000001-01-01T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Schedule of Available-for-sale Securities [Line Items]2false 4us-gaap_OtherInvestmentsAndSecuritiesAtCostus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2466248600024662486USD$falsetruefalse2truefalsefalse2277173100022771731USD$falsetruefalsexbrli:monetaryItemTypemonetaryIncludes other investments and securities that are not at fair value as of the balance sheet date and those that are not accounted for under the equity method.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph a -Subparagraph 1(g) -Article 7 false2Principal balance3false 4hts_AvailableForSaleUnamortizedPremiumhts_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse736237000736237falsefalsefalse2truefalsefalse648181000648181falsefalsefalsexbrli:monetaryItemTypemonetaryAvailable for sale Unamortized PremiumNo definition available.false2Unamortized premium4false 4hts_AvailableForSaleUnamortizedDiscounthts_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-2000-2falsefalsefalse2truefalsefalse-4000-4falsefalsefalsexbrli:monetaryItemTypemonetaryAvailable for sale Unamortized DiscountNo definition available.false2Unamortized discount5false 4hts_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestmentshts_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse200412000200412falsefalsefalse2truefalsefalse499464000499464falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments.No definition available.false2Gross unrealized gains6false 4hts_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestmentshts_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedTerseLabel1truefalsefalse-343090000-343090falsefalsefalse2truefalsefalse-121000-121falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments.No definition available.false2Gross unrealized losses7false 4us-gaap_FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValueus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse2525604300025256043USD$falsetruefalse2truefalsefalse2391925100023919251USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29643736&loc=d3e42546-110969 true2Carrying value/estimated fair valuefalseComponents of Carrying Value of Available-For-Sale Agency Securities (Detail) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.hatfin.com/taxonomy/role/DisclosureComponentsOfCarryingValueOfAvailableForSaleAgencySecurities27