XML 25 R47.htm IDEA: XBRL DOCUMENT v2.4.0.8
Debt (Details 4) (USD $)
0 Months Ended
Aug. 31, 2014
Aug. 31, 2014
Credit Agreement
Jun. 11, 2014
Credit Agreement
Jun. 10, 2014
Credit Agreement
Jun. 11, 2014
Credit Agreement
Maximum
Jun. 10, 2014
Credit Agreement
Maximum
Jun. 11, 2014
Credit Agreement
Limitation on dividends and stock repurchases
Maximum
Aug. 31, 2014
3.90% unsecured Senior Notes payable
Fair value
Feb. 28, 2014
3.90% unsecured Senior Notes payable
Fair value
Aug. 31, 2014
3.90% unsecured Senior Notes payable
Fair value
Fair Value, Level 2
Feb. 28, 2014
3.90% unsecured Senior Notes payable
Fair value
Fair Value, Level 2
Aug. 31, 2014
3.90% unsecured Senior Notes payable
Fair value
Fair Value, Level 2
Discounted cash flow analysis
Aug. 31, 2014
3.90% unsecured Senior Notes payable
Book value
Long-term debt                          
Long-term debt               $ 84,175,000 $ 83,951,000 $ 84,175,000 $ 83,951,000 $ 84,180,000 $ 80,000,000
Unsecured revolving commitment   570,000,000 570,000,000 375,000,000                  
Leverage Ratio         325.00% 300.00% 275.00%            
Limit on additional debt borrowings $ 65,580,000