XML 59 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6
Debt (Details) (USD $)
6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2012
Feb. 29, 2012
Aug. 31, 2012
Credit Agreement
item
Aug. 31, 2012
Credit Agreement
Minimum
Aug. 31, 2012
Credit Agreement
Minimum
Aug. 31, 2012
Credit Agreement
Maximum
Aug. 31, 2012
Credit Agreement
Maximum
Revolving Line of Credit              
Unsecured total revolving commitment     $ 250,000,000        
Accrued interest on borrowings, number of alternative methods     2        
Revolving loans outstanding 161,000,000 171,100,000 161,000,000        
Open letters of credit outstanding     620,000        
Interest rate (as a percent)       1.61% 1.61% 3.63% 4.00%
Amount available for borrowings     $ 88,380,000