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Debt Asset-Based Revolving Credit Facility (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Mar. 30, 2016
May 15, 2015
AssetBasedCreditFacility [Member]        
Line of Credit Facility [Line Items]        
Fixed charge coverage ratio requirement, if availability falls below 10% of aggregate lending commitments (as a percent) 100.00%      
Threshold of availability as a percentage of aggregate lending commitments, below which 1:1 fixed charge coverage ratio must be met 10.00%      
Threshold of availability, below which 1:1 fixed charge coverage ratio must be met $ 37,000,000      
Current availability $ 365,300,000      
Dividend restriction, single threshold, percentage of aggregate Revolver Commitments 25.00%      
Dividend restriction, combination thresholds, percentage of aggregate Revolver Commitments 15.00%      
Dividend restriction, combination thresholds, fixed-charge coverage ratio (as a percent) 100.00%      
Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity       $ 370,000,000
Commitment fee rate (as a percentage) 0.25%      
Amount outstanding on Revolving Credit Facility $ 0 $ 0    
Letters of credit outstanding 4,700,000 $ 5,900,000    
Revolving Credit Facility, Minimum Amount Outstanding During Period 0      
Revolving Credit Facility, Maximum Amount Outstanding During Period $ 2,800,000      
Revolving Credit Facility, Average Interest Rate During Period 3.07%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 1.25%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 1.75%      
Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 0.25%      
Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 0.75%      
Asset based Credit Facility Term Loan        
ABL Term Loan [Abstract]        
Debt Instrument, Face Amount       $ 50,000,000
Debt Instrument, Interest Rate During Period 3.35%      
Debt Instrument, Interest Rate During Period With Patronage Credits 2.60%      
Asset based Credit Facility Term Loan | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 1.75%      
Asset based Credit Facility Term Loan | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 2.25%      
Asset based Credit Facility Term Loan | Base Rate [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 0.75%      
Asset based Credit Facility Term Loan | Base Rate [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 1.25%      
Term Loan Due 2026 [Member]        
ABL Term Loan [Abstract]        
Debt Instrument, Face Amount     $ 75,000,000  
Debt Instrument, Interest Rate During Period 3.48%      
Debt Instrument, Interest Rate During Period With Patronage Credits 2.70%      
Term Loan Due 2026 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 1.875%      
Term Loan Due 2026 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 2.125%      
Term Loan Due 2026 [Member] | Base Rate [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 0.875%      
Term Loan Due 2026 [Member] | Base Rate [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Basis spread on variable interest rate 1.125%