XML 20 R25.htm IDEA: XBRL DOCUMENT v2.3.0.15
Debt (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended
Mar. 31, 2011
Sep. 30, 2011
Debt [Abstract]  
Interest rate under the credit agreementThe interest rate under the Credit Agreement is equal to LIBOR plus 1.75%. 
Current unsecured borrowing capacity$ 10.0 
Maximum unsecured borrowing capacity50.0 
Line of credit, expiration dateMarch 2014 
Minimum net worth300.0 
Minimum cash flow leverage ratio1.0 
Maximum cash flow leverage ratio2.0 
Commitment fee charged on the unused line of credit0.375% 
Outstanding letters of credit 2.6
Unused and available borrowings under bank revolving line of credit $ 47.4