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Financing Arrangements (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2016
Jul. 31, 2019
Jul. 31, 2018
Oct. 31, 2018
Oct. 30, 2015
Apr. 29, 2015
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate During Period   5.26% 3.82%      
Letters of Credit Outstanding, Amount   $ 6,206        
Collateral Agreement   66.00%        
Long-term Debt   $ 246,700        
Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of Credit Increase Maximum       $ 150,000   $ 100,000
Line of Credit Facility, Maximum Borrowing Capacity       $ 350,000   360,000
Line of Credit Facility, Remaining Borrowing Capacity   97,094        
Line of Credit Increase Minimum           25,000
Line of Credit, Committed Reductions           $ 30,000
Line of Credit Facility, Increase (Decrease), Net $ 5,000          
Line of Credit Facility, Current Borrowing Capacity         $ 355,000  
Minimum [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage       3.05%    
Maximum [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage       3.77%    
Maximum [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Capacity Available for Debt Issuance         40,000  
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases         $ 50,000  
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Long-term Debt   246,700   $ 243,300    
Capital Lease Obligations [Member]            
Debt Instrument [Line Items]            
Long-term Debt   $ 2,043   2,640    
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Basis Spread on Variable Rate   1.50%        
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Basis Spread on Variable Rate   3.00%        
Base Rate [Member] | Minimum [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Basis Spread on Variable Rate   0.50%        
Base Rate [Member] | Maximum [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Basis Spread on Variable Rate   2.00%        
Tranche B Facility [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity       75,000    
Tranche A Facility [Member] | Lender Group Two [Member] | Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity       275,000    
Insurance Financing Agreement [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage     2.55%      
Debt Instrument, Periodic Payment     $ 94      
Short-term Debt   $ 0   $ 738