2.2.0.7 false Accounting Policies 0201 - Disclosure - Accounting 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 Accounting Policies [Abstract] 0 us-gaap_GeneralPoliciesAbstract us-gaap true na duration No definition available. 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 No definition available. false 3 Accounting Policies 1 us-gaap_SignificantAccountingPoliciesTextBlock us-gaap true na duration No definition available. 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-family: 'Times New Roman',Times,serif; margin-left: 0in; "> <div align="center" style="font-size: 10pt; margin-top: 0pt"><b></b> </div> <div align="left"> </div>   <div align="center" style="font-size: 10pt; margin-top: 0pt"><b></b> </div> <div align="center" style="font-size: 10pt"><i></i></div> <div align="justify" style="font-size: 10pt; margin-top: 10pt"><b>Note 1. Accounting Policies</b> </div> <div align="justify" style="font-size: 10pt; margin-top: 10pt">The accompanying interim consolidated financial statements are unaudited and reflect all adjustments which, in the opinion of management, are necessary to fairly present the results of The Navigators Group, Inc. and its subsidiaries for the interim periods presented on the basis of United States generally accepted accounting principles (“GAAP” or “U.S. GAAP”). All such adjustments are of a normal recurring nature. All significant intercompany transactions and balances have been eliminated. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported revenues and expenses during the reporting periods. The results of operations for any interim period are not necessarily indicative of results for the full year. The terms “we”, “us”, “our” and “the Company” as used herein are used to mean The Navigators Group, Inc. and its subsidiaries, unless the context otherwise requires. The term “Parent” or “Parent Company” are used to mean The Navigators Group, Inc. without its subsidiaries. These financial statements should be read in conjunction with the consolidated financial statements and notes contained in the Company’s 2009 Annual Report on Form 10-K. Certain amounts for the prior year have been reclassified to conform to the current year’s presentation. Commission income, previously disclosed as a separate line item in the Consolidated Statements of Income, is now included in Other income (expense). </div> </div>  <!-- Begin Block Tagged Note false false false us-types:textBlockItemType textblock This element may be used to describe all significant accounting policies of the reporting entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 22 -Paragraph 8 false 1 2 false UnKnown UnKnown UnKnown false true