XML 95 R78.htm IDEA: XBRL DOCUMENT v3.8.0.1
Long-Term Debt - Interest rates (Details) - Credit Agreement
$ in Thousands
 12 Months Ended
Feb. 28, 2018
USD ($)
item
Feb. 28, 2017
USD ($)
Feb. 29, 2016
USD ($)
Revolving Line of Credit      
Average borrowings outstanding | $ $ 382,960 $ 498,420 $ 399,800
Average interest rates during each year (as a percent) 2.70% 2.20% 1.60%
Weighted average interest rates on borrowings outstanding at year end (as a percent) 2.90% 2.30% 2.80%
Number of prior quarters used in calculation of average borrowings outstanding | item 4    
Minimum      
Revolving Line of Credit      
Interest rate range during each year (as a percent) 2.30% 1.90% 1.40%
Maximum      
Revolving Line of Credit      
Interest rate range during each year (as a percent) 4.80% 4.30% 4.00%