2.4.0.81116 - Disclosure - Segment Reporting (Restated) - Sales, Attributed to Area to Which Product was Shipped (Detail)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$eol_PE9760----1210-K0011_STD_366_20120831_0http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$eol_PE9760----1210-K0011_STD_365_20110831_0http://www.sec.gov/CIK0000739608duration2010-09-01T00:00:002011-08-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$eol_PE9760----1210-K0011_STD_365_20100831_0http://www.sec.gov/CIK0000739608duration2009-09-01T00:00:002010-08-31T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]2false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse433151000433151USD$falsetruefalse2truefalsefalse373763000373763USD$falsetruefalse3truefalsefalse294517000294517USD$falsetruefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales3false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x565014http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseUnited States [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldicountry_USus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0United States [Member]4true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]5false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToEntitysCountryOfDomicileus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse400070000400070USD$falsefalsefalse2truefalsefalse346893000346893USD$falsefalsefalse3truefalsefalse271285000271285USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to the entity's country of domicile.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales6false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse7false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x564894http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseCanada [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldicountry_CAus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Canada [Member]7true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]8false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse56530005653USD$falsefalsefalse2truefalsefalse40270004027USD$falsefalsefalse3truefalsefalse37380003738USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales9false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse10false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x565016http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseMexico [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldicountry_MXus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Mexico [Member]10true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]11false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1276100012761USD$falsefalsefalse2truefalsefalse92210009221USD$falsefalsefalse3truefalsefalse69960006996USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales12false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse13false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x564846http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseColumbia [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldicountry_COus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Columbia [Member]13true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]14false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse66780006678USD$falsefalsefalse2truefalsefalse68020006802USD$falsefalsefalse3truefalsefalse62270006227USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales15false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse16false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x564937http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseJapan [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldicountry_JPus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Japan [Member]16true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]17false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse43800004380USD$falsefalsefalse2truefalsefalse34340003434USD$falsefalsefalse3truefalsefalse11730001173USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales18false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse19false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x591384http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseOther Country [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldipenx_OtherCountryMemberus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Other Country [Member]19true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]20false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse36090003609USD$falsefalsefalse2truefalsefalse33860003386USD$falsefalsefalse3truefalsefalse50980005098USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Sales21false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse22false USDtruefalse$eol_PE9760----1210-K0011_STD_366_20120831_0_577830x596166http://www.sec.gov/CIK0000739608duration2011-09-01T00:00:002012-08-31T00:00:00falsefalseNon-United States [Member]us-gaap_StatementGeographicalAxisxbrldihttp://xbrl.org/2006/xbrldipenx_NonUnitedStatesMemberus-gaap_StatementGeographicalAxisexplicitMemberiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Non-United States [Member]22true 3penx_SalesConcentrationLineItemspenx_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Sales Concentration [Line Items]23false 4us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse3308100033081USD$falsetruefalse2truefalsefalse2687000026870USD$falsetruefalse3truefalsefalse2323200023232USD$falsetruefalsexbrli:monetaryItemTypemonetaryRevenues from external customers attributed to all foreign countries in total from which the entity derives revenues.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 38 -Subparagraph a(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2SalesfalseSegment Reporting (Restated) - Sales, Attributed to Area to Which Product was Shipped (Detail) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.penx.com/taxonomy/role/DisclosureSegmentReportingRestatedSalesAttributedToAreaToWhichProductWasShipped323