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Borrowings and Finance Lease Obligations (Details) - USD ($)
12 Months Ended
Feb. 16, 2016
Jun. 23, 2015
Feb. 01, 2020
Feb. 02, 2019
Feb. 03, 2018
Mar. 19, 2020
Borrowings and finance lease obligations            
Mortgage debt, maturing monthly through January 2026     $ 19,132,000 $ 19,738,000    
Finance lease obligations     16,535,000      
Capital lease obligations       16,702,000    
Other     2,636,000 2,887,000    
Mortgage Debt            
Mortgage debt, maturing monthly through January 2026     19,132,000 19,738,000    
Debt issuance costs     3,620,000      
Finance Lease Obligations            
Finance lease obligations incurred     3,070,000 1,172,000 $ 18,502,000  
Credit Facilities            
Credit Facility, outstanding amount     3,957,000 0    
Subsequent events            
Credit Facilities            
Credit Facility, outstanding amount           $ 212,000,000
Europe | Foreign line of credit            
Credit Facilities            
Current borrowing capacity     139,000,000      
Letters of credit outstanding     0      
Credit Facility, outstanding amount     $ 0      
Europe | Foreign line of credit | Subsequent events            
Credit Facilities            
Credit Facility, outstanding amount           $ 134,000,000
Europe | Foreign line of credit | Minimum            
Credit Facilities            
Interest rate (as a percent)     0.50%      
Europe | Foreign line of credit | Maximum            
Credit Facilities            
Interest rate (as a percent)     4.50%      
China | Foreign line of credit            
Credit Facilities            
Maximum borrowing capacity     $ 20,000,000      
Credit Facility, outstanding amount     $ 4,000,000.0      
Cash flow hedges | Interest rate swap | Derivatives designated as hedging instruments            
Mortgage Debt            
Fixed rate of interest rate swap derivative (as a percent)     3.06%      
Long-term debt and finance lease liabilities, excluding convertible senior notes            
Borrowings and finance lease obligations            
Total debt and finance lease obligations     $ 42,260,000 39,327,000    
Less current installments     9,490,000 4,315,000    
Long-term debt and finance lease obligations     32,770,000 35,012,000    
Mortgage Debt            
Debt issuance costs     66,000      
Mortgage debt | Building | U.S.            
Borrowings and finance lease obligations            
Mortgage debt, maturing monthly through January 2026 $ 21,500,000   19,100,000 19,700,000    
Mortgage Debt            
Debt maturity period (in years) 10 years          
Mortgage debt, maturing monthly through January 2026 $ 21,500,000   19,100,000 19,700,000    
Debt amortization period (in years) 25 years          
Debt issuance costs     $ 100,000 100,000    
Mortgage debt | Building | U.S. | LIBOR            
Mortgage Debt            
Interest rate margin (as a percent)     1.50%      
Mortgage debt | Building | U.S. | Interest rate swap            
Mortgage Debt            
Fair value of cash flow hedge interest rate swap liability     $ (300,000)      
Fair value of cash flow hedge interest rate swap asset       1,000,000.0    
Mortgage debt | Building | Cash flow hedges | U.S. | Interest rate swap | Derivatives designated as hedging instruments            
Mortgage Debt            
Fixed rate of interest rate swap derivative (as a percent) 3.06%          
Capital lease obligation | Computer hardware and software            
Borrowings and finance lease obligations            
Finance lease obligations     4,000,000.0      
Capital lease obligations       2,000,000.0    
Finance Lease Obligations            
Finance lease obligations incurred     3,100,000 1,200,000 1,500,000  
Capital lease obligation | Equipment | Netherlands            
Borrowings and finance lease obligations            
Finance lease obligations     $ 12,600,000      
Capital lease obligations       $ 14,700,000    
Finance Lease Obligations            
Finance lease obligations incurred         $ 17,000,000.0  
Effective interest rate     6.00%      
Credit Facility            
Credit Facilities            
Percentage of borrowings exceeding borrowing base that require the Company to comply with a fixed charge coverage ratio on a trailing four-quarter basis     80.00%      
Credit Facility, outstanding amount     $ 0      
Credit Facility | Revolving Credit Facility            
Mortgage Debt            
Debt maturity period (in years)   5 years        
Credit Facilities            
Maximum borrowing capacity   $ 150,000,000        
Current borrowing capacity     $ 113,000,000      
Credit Facility | Accordion feature            
Credit Facilities            
Maximum borrowing capacity   150,000,000        
Credit Facility | U.S. line of credit | Base rate | Minimum            
Mortgage Debt            
Interest rate margin (as a percent)     0.25%      
Credit Facility | U.S. line of credit | Base rate | Maximum            
Mortgage Debt            
Interest rate margin (as a percent)     0.75%      
Credit Facility | U.S. line of credit | LIBOR            
Credit Facilities            
Interest rate margin added to respective base rate     1.00%      
Credit Facility | U.S. line of credit | LIBOR | Minimum            
Mortgage Debt            
Interest rate margin (as a percent)     1.25%      
Credit Facility | U.S. line of credit | LIBOR | Maximum            
Mortgage Debt            
Interest rate margin (as a percent)     1.75%      
Credit Facility | U.S. line of credit | Federal funds rate            
Credit Facilities            
Interest rate margin added to respective base rate     0.50%      
Credit Facility | Standby letters of credit            
Credit Facilities            
Letters of credit outstanding     $ 2,300,000      
Credit Facility | Documentary letters of credit            
Credit Facilities            
Letters of credit outstanding     $ 0      
Credit Facility | Canada | Foreign line of credit            
Credit Facilities            
Maximum borrowing capacity   $ 50,000,000        
Credit Facility | Canada | Foreign line of credit | Prime rate | Minimum            
Mortgage Debt            
Interest rate margin (as a percent)     0.25%      
Credit Facility | Canada | Foreign line of credit | Prime rate | Maximum            
Mortgage Debt            
Interest rate margin (as a percent)     0.75%      
Credit Facility | Canada | Foreign line of credit | Canadian BA rate            
Credit Facilities            
Interest rate margin added to respective base rate     1.00%      
Credit Facility | Canada | Foreign line of credit | Canadian BA rate | Minimum            
Mortgage Debt            
Interest rate margin (as a percent)     1.25%      
Credit Facility | Canada | Foreign line of credit | Canadian BA rate | Maximum            
Mortgage Debt            
Interest rate margin (as a percent)     1.75%      
Credit Facility | Canada | Foreign line of credit | Bank of Canada overnight rate            
Credit Facilities            
Interest rate margin added to respective base rate     0.50%