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USD ($)
USD ($) / shares
$c00004http://www.sec.gov/CIK0000060849duration2011-01-01T00:00:002011-03-31T00:00:00u000Standardhttp://www.xbrl.org/2003/iso4217USDiso42170u002Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0lufk_NotesToFinancialStatementsAbstractlufkfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse3false0us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 19.3pt" align="left"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold">1. Basis of Presentation</font></div><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 19.3pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The accompanying unaudited condensed consolidated financial statements include the accounts of Lufkin Industries, Inc. and its consolidated subsidiaries (the “Company”) and have been prepared pursuant to the rules and regulations for interim financial statements of the Securities and Exchange Commission. Certain information in the notes to the consolidated financial statements normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America has been condensed or omitted pursuant to these rules and regulations for interim financial statements. In the opinion of management, all adjustments, consisting of normal recurring accruals unless specified, necessary for a fair presentation of the Company’s financial position, results of operations and cash flows for the interim periods included in this report have been included. For further information, including a summary of major accounting policies, refer to the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2010. The results of operations for the three months ended March 31, 2011, are not necessarily indicative of the results that may be expected for the full fiscal year.</font></div><div style="TEXT-INDENT: 0pt; DISPLAY: block"><br /></div><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 19.3pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">In June 2010, the Company’s Board of Directors approved a 2-for-1 stock dividend to be effected by issuing one additional share of the Company’s common stock for every share of the Company’s common stock outstanding on the stock dividend record date.  The additional shares of the Company’s common stock issued in connection with the stock dividend were distributed on June 1, 2010 to stockholders of record at the close of business on May 19, 2010.  All prior period shares outstanding, earnings per share and prices per share have been adjusted to reflect the stock dividend.</font></div><div style="TEXT-INDENT: 0pt; DISPLAY: block"><br /></div><div style="TEXT-INDENT: 0pt; DISPLAY: block; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 19.3pt" align="justify"><font style="DISPLAY: inline; FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt">The Company’s financial instruments include cash, accounts receivable, accounts payable, invested funds and debt obligations. The book value of accounts receivable, short-term debt and accounts payable are considered to be representative of their fair market value because of the short maturity of these instruments. The Company’s accounts receivable does not have an unusual credit risk or concentration risk. </font></div>1. Basis of PresentationThe accompanying unaudited condensed consolidated financial statements include the accounts of Lufkin Industries, Inc. and itsfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescription containing the entire organization, consolidation and basis of presentation of financial statements disclosure. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows. Describes procedure if disclosures are provided in more than one note to the financial statements.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4 and FIN46(R)-8
-Paragraph 8, C1, C7
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 94-6
-Paragraph 10
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4, 14, 15
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