2.2.0.25falsefalse0210 - Disclosure - Fiduciary Fundstruefalsefalse1falsefalseUSDfalsefalse1/1/2010 - 12/31/2010 USD ($) USD ($) / shares $Jan-01-2010_Dec-31-2010http://www.sec.gov/CIK0000793547duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDEPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0navg_FiduciaryFundsAbstractnavgfalsenadurationFiduciary funds.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringFiduciary funds.falsefalseFiduciary Funds [Abstract]3false0navg_FiduciaryFundsTextBlocknavgfalsenadurationFiduciary funds.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse00  <div style="font-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="justify" style="font-size: 10pt; margin-top: 10pt"><b>Note 10. Fiduciary Funds</b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">Prior to 2006, the underwriting agencies managed insurance pools in which Navigators Insurance Company participated. Functions performed by the underwriting agencies included underwriting business, collecting premiums from the insured, paying claims, collecting paid recoverables from reinsurers, paying reinsurance premiums to reinsurers and remitting net account balances to member insurance companies. Funds received by the Company belonging to non-related participants in the former insurance pools are not material. They are held in a fiduciary capacity and are included in the accompanying consolidated balance sheets. </div> </div>  <!-- Begin Block Tagged NotefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringFiduciary funds.No authoritative reference available.falsefalseFiduciary Funds12Fiduciary FundsUnKnownUnKnownUnKnownUnKnownfalsetrue