2.2.0.7 false Fair Value Measurements (Policies) 0406 - Disclosure - Fair Value Measurements (Policies) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Fair Value Measurements [Abstract] 0 hcbk_FairValueMeasurementsAbstract hcbk false na duration Fair Value Measurements. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Fair Value Measurements. false 3 Adoption of ASC Topic 820 policy 1 hcbk_FairValueOfFinancialInstrumentsPolicyTextBlock hcbk false na duration Describes an entity's accounting policy for determining the fair value of its financial instruments. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <div align="left" style="font-size: 10pt; font-family: 'Times New Roman',Times,serif"> <div align="left" style="font-size: 10pt; margin-top: 6pt">In accordance with ASC Topic 820, we group our assets at fair value in three levels, based on the markets in which the assets are traded and the reliability of the assumptions used to determine fair value. These levels are: </div> <div align="left" style="font-size: 10pt; margin-top: 6pt"><b>•</b> Level 1 — Valuation is based upon quoted prices for identical instruments traded in active markets. </div> <div align="left" style="font-size: 10pt; margin-top: 6pt"><b>•</b> Level 2 — Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market. </div> <div align="left" style="font-size: 10pt; margin-top: 6pt"><b>•</b> Level 3 — Valuation is generated from model-based techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect our own estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include the use of option pricing models, discounted cash flow models and similar techniques. The results cannot be determined with precision and may not be realized in an actual sale or immediate settlement of the asset or liability. </div> <div align="left" style="font-size: 10pt; margin-top: 6pt">We base our fair values on the price that would be received to sell an asset in an orderly transaction between market participants at the measurement date. ASC Topic 820 requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. </div> </div>  <!-- Begin Block Tagged false false false us-types:textBlockItemType textblock Describes an entity's accounting policy for determining the fair value of its financial instruments. No authoritative reference available. false 1 2 false UnKnown UnKnown UnKnown false true