Note Payable	12 Months Ended
Dec. 31, 2013
Notes Payable, Current [Abstract]
Note Payable	Note Payable We have one line of credit with multiple commercial banks with a borrowing capacity of $225 million, with an additional $50 million accordion feature. The 2012 credit agreement is a $225 million unsecured revolving credit facility with a term of five years expiring May 31, 2017. We had no compensating balance requirements on short-term debt for either 2013 or 2012. At December 31, 2013 and 2012, $104 million was drawn on the line of credit.The interest rate charged on our borrowings on this credit agreement ranged from 1.3 percent to 1.35 percent during 2013 and ranged from 0.7 percent to 2.58 percent during 2012.

Note Payable

We have one line of credit with multiple commercial banks with a borrowing capacity of $225 million, with an additional $50 million accordion feature. The 2012 credit agreement is a $225 million unsecured revolving credit facility with a term of five years expiring May 31, 2017. We had no compensating balance requirements on short-term debt for either 2013 or 2012. At December 31, 2013 and 2012, $104 million was drawn on the line of credit.The interest rate charged on our borrowings on this credit agreement ranged from 1.3 percent to 1.35 percent during 2013 and ranged from 0.7 percent to 2.58 percent during 2012.