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DEBT (Details) (USD $)
0 Months Ended 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Jan. 31, 2014
Jan. 31, 2012
Debt            
Average annual interest rate on short-term notes payable (as a percent)     1.50%us-gaap_ShortTermDebtWeightedAverageInterestRate 3.10%us-gaap_ShortTermDebtWeightedAverageInterestRate    
Long-term obligations including current maturities     $ 607,584,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent $ 356,139,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent    
Current maturities of long-term obligations     (18,692,000)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent (1,325,000)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent    
Total long-term obligations     588,892,000us-gaap_LongTermDebtAndCapitalLeaseObligations 354,814,000us-gaap_LongTermDebtAndCapitalLeaseObligations    
Aggregate long-term maturities, excluding capital lease obligations            
2015     18,057,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths      
2016     51,217,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo      
2017     0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree      
2018     75,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour      
2019     0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive      
Thereafter     460,886,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive      
Unsecured lines of credit            
Debt            
Average borrowings     198,300,000us-gaap_LineOfCreditFacilityAverageOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= atr_UnsecuredLinesOfCreditMember
61,400,000us-gaap_LineOfCreditFacilityAverageOutstandingAmount
/ us-gaap_DebtInstrumentAxis
= atr_UnsecuredLinesOfCreditMember
   
Revolving credit facility            
Debt            
Revolving credit, maximum borrowing facility           300,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
Extension of maturity date 1 year 1 year        
Amount of permitted receivables transactions prior to amendment 100,000,000atr_LineOfCreditFacilityPermittedReceivablesTransactionsAmountPriorToAmendment
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
      100,000,000atr_LineOfCreditFacilityPermittedReceivablesTransactionsAmountPriorToAmendment
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
Amount of permitted receivables transactions 150,000,000atr_LineOfCreditFacilityPermittedReceivablesTransactionsAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
      150,000,000atr_LineOfCreditFacilityPermittedReceivablesTransactionsAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
Reduction in cost of committed funds 0.125%atr_LineOfCreditFacilityBasisPointsChangeInCostOfCommittedFunds
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
      0.125%atr_LineOfCreditFacilityBasisPointsChangeInCostOfCommittedFunds
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
Reduction in cost of uncommitted funds 0.025%atr_LineOfCreditFacilityBasisPointsChangeInCostOfUncommittedFunds
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
      0.025%atr_LineOfCreditFacilityBasisPointsChangeInCostOfUncommittedFunds
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
 
Amount outstanding under line of credit     230,000,000us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
110,000,000us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
   
Credit facility interest and fees     2,700,000atr_LineOfCreditFacilityInterestAndFees
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
1,000,000atr_LineOfCreditFacilityInterestAndFees
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
   
Notes payable 0.61% - 31.25%, due in monthly and annual installments through 2027            
Debt            
Long-term obligations including current maturities     5,160,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
3,230,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
   
Interest rate on notes payable, low end of range (as a percent)     0.61%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
0.61%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
   
Interest rate on notes payable, high end of range (as a percent)     31.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
31.25%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_DebtInstrumentAxis
= us-gaap_NotesPayableOtherPayablesMember
   
Senior unsecured notes 2.3%, due in 2015            
Debt            
Long-term obligations including current maturities     16,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes2.3PercentDue2015PercentMember
16,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes2.3PercentDue2015PercentMember
   
Interest rate on senior unsecured notes (as a percent)     2.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes2.3PercentDue2015PercentMember
2.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes2.3PercentDue2015PercentMember
   
Senior unsecured notes 6.0% due in 2016            
Debt            
Long-term obligations including current maturities     50,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2016Member
50,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2016Member
   
Interest rate on senior unsecured notes (as a percent)     6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2016Member
6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2016Member
   
Senior unsecured notes 6.0%, due in 2018            
Debt            
Long-term obligations including current maturities     75,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2018Member
75,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2018Member
   
Interest rate on senior unsecured notes (as a percent)     6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2018Member
6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes6.0PercentDue2018Member
   
Senior unsecured notes 3.8%, due in 2020            
Debt            
Long-term obligations including current maturities     84,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.8PercentDue2020Member
84,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.8PercentDue2020Member
   
Interest rate on senior unsecured notes (as a percent)     3.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.8PercentDue2020Member
3.80%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.8PercentDue2020Member
   
Senior unsecured notes 3.2%, due in 2022            
Debt            
Long-term obligations including current maturities     75,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.2PercentDue2022Member
75,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.2PercentDue2022Member
   
Interest rate on senior unsecured notes (as a percent)     3.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.2PercentDue2022Member
3.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.2PercentDue2022Member
   
Senior unsecured notes 3.5% due in 2023            
Debt            
Long-term obligations including current maturities     125,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.5PercentDue2023Member
     
Interest rate on senior unsecured notes (as a percent)     3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.5PercentDue2023Member
3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.5PercentDue2023Member
   
Senior unsecured notes 3.4%, due in 2024            
Debt            
Long-term obligations including current maturities     50,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.4PercentDue2024Member
50,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.4PercentDue2024Member
   
Interest rate on senior unsecured notes (as a percent)     3.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.4PercentDue2024Member
3.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.4PercentDue2024Member
   
Senior unsecured notes 3.6% due in 2025            
Debt            
Long-term obligations including current maturities     125,000,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.6PercentDue2025Member
     
Interest rate on senior unsecured notes (as a percent)     3.60%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.6PercentDue2025Member
3.60%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= atr_SeniorUnsecuredNotes3.6PercentDue2025Member
   
Capital lease obligations            
Debt            
Long-term obligations including current maturities     $ 2,424,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= us-gaap_CapitalLeaseObligationsMember
$ 2,909,000atr_LongTermDebtAndCapitalLeaseObligationsCurrentAndNoncurrent
/ us-gaap_DebtInstrumentAxis
= us-gaap_CapitalLeaseObligationsMember