2.4.0.840901 - Disclosure - Financial Instruments (Narrative) (Details)truefalseIn Millions, unless otherwise specifiedfalse1false USDtruefalse$As_Of_6_29_2013_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_ForeignExchangeContractMemberhttp://www.sec.gov/CIK0000025793instant2013-06-29T00:00:000001-01-01T00:00:00falsefalseForeign Exchange Contracts [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDtruefalse$As_Of_12_29_2012_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_ForeignExchangeContractMemberhttp://www.sec.gov/CIK0000025793instant2012-12-29T00:00:000001-01-01T00:00:00falsefalseForeign Exchange Contracts [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ForeignExchangeContractMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberUnit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalseDuration_12_30_2012_To_6_29_2013_us-gaap_DerivativeInstrumentRiskAxis_us-gaap_InterestRateSwapMemberhttp://www.sec.gov/CIK0000025793duration2012-12-30T00:00:002013-06-29T00:00:00falsefalseInterest Rate Swaps [Member]us-gaap_DerivativeInstrumentRiskAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_InterestRateSwapMemberus-gaap_DerivativeInstrumentRiskAxisexplicitMemberUnit15Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit1Standardhttp://www.xbrl.org/2003/iso4217USDiso42170$1true 3us-gaap_DerivativeLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Derivative [Line Items]2false 4us-gaap_NotionalAmountOfForeignCurrencyDerivativesus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1340000013.4USD$falsetruefalse2truefalsefalse2460000024.6USD$falsetruefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 false2Foreign currency derivatives notional value3false 4us-gaap_DerivativeInceptionDatesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse002011-01-01falsefalsetruexbrli:dateItemTypedateDate the entity entered into the derivative contract, in CCYY-MM-DD format.No definition available.false0Derivative, Inception Date4false 4us-gaap_NotionalAmountOfInterestRateDerivativesus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse1500000015.0USD$falsetruefalsexbrli:monetaryItemTypemonetaryAggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 false2Notional amount of interest rate swap5false 4atx_TermOfDerivativeContractsatx_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse003 yearsfalsefalsefalsexbrli:durationItemTypenaTerm of derivative contractsNo definition available.false0Term of derivative contracts6false 4us-gaap_DerivativeFixedInterestRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3truetruefalse0.0120.012falsefalsefalsenum:percentItemTypepureFixed interest rate related to the interest rate derivative.No definition available.false0Interest rate on portion of the Company's line of creditfalseFinancial Instruments (Narrative) (Details) (USD $)HundredThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://cross.com/role/DisclosureFinancialInstrumentsNarrativeDetails36