2.4.0.8022 - Disclosure - Note 4 - Treasury Stock (Details)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$c2_From1Apr2013To30Jun2013http://www.sec.gov/CIK0000071829duration2013-04-01T00:00:002013-06-30T00:00:00sharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1nr_TreasuryStockTextBlockAbstractnr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Treasury Stock [Text Block]2false 2us-gaap_StockRepurchaseProgramAuthorizedAmountus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5000000050.0USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount of a stock repurchase plan authorized by an entity's Board of Directors.No definition available.false2Stock Repurchase Program, Authorized Amount (in Dollars)3false 2us-gaap_StockRepurchasedDuringPeriodSharesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesNumber of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 false1Stock Repurchased During Period, SharesfalseNote 4 - Treasury Stock (Details) (USD $)HundredThousandsMillionsUnKnownUnKnowntruefalsefalseSheethttp://www.newpark.com/role/Note4TreasuryStockDetails13