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Long-Term Debt - Summary of long-term debt (Details) - USD ($)
$ in Thousands
9 Months Ended
Nov. 30, 2019
Feb. 28, 2019
Debt Instrument [Line Items]    
Total long-term debt $ 244,247 $ 320,784
Less current maturities of long-term debt (1,884) (1,884)
Long-term debt, excluding current maturities 242,363 318,900
MBFC loan    
Debt Instrument [Line Items]    
Total long-term debt 20,447 22,335
Remaining principal balance due on March 1, 2020 1,900  
Remaining principal balance due on March 1, 2021 1,900  
Remaining principal balance due on March 1, 2022 1,900  
Remaining principal balance due on March 1, 2023 $ 14,800  
MBFC loan | LIBOR | Maximum    
Debt Instrument [Line Items]    
Interest rate 2.00%  
MBFC loan | Base rate    
Debt Instrument [Line Items]    
Interest rate 1.00%  
Credit agreement    
Debt Instrument [Line Items]    
Total long-term debt $ 223,800 $ 298,449
Amount of interest rate swap hedge $ 225,000