2.2.0.25falsefalse006140 - Disclosure - Litigationtruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $c00007http://www.sec.gov/CIK0000110430duration2011-01-01T00:00:002011-03-31T00:00:00u000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u002Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0fto_NotesToFinancialStatementsAbstractftofalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseNotes to Financial Statements [Abstract]3false0us-gaap_ScheduleOfLossContingenciesByContingencyTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">14.&#160;&#160;&#160;&#160;&#160;&#160;Litigation</font></div><div style="TEXT-INDENT: 0pt; DISPLAY: block"><br /></div><div style="TEXT-INDENT: 18pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The Company is involved in various lawsuits and regulatory actions which are incidental to its business.&#160;&#160;In relation to the Holly proposed merger, twelve substantially similar shareholder lawsuits styled as class actions have been filed by alleged Frontier shareholders challenging the merger and naming as defendants Frontier, its board of directors and, in certain instances, Holly Corporation and a subsidiary of Holly Corporation, as aiders and abettors. In management's opinion, the adverse determination of such lawsuits would not have a material adverse effect on the Company's liquidity, financial position or results of operations.</font></div>14.&#160;&#160;&#160;&#160;&#160;&#160;LitigationThe Company is involved in various lawsuits and regulatory actions which are incidental to itsfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes and quantifies the loss contingencies that were reported in the period or disclosed as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9-12, 22-40 falsefalseLitigation12LitigationUnKnownUnKnownUnKnownUnKnownfalsetrue