This excerpt taken from the AN 10-K filed Feb 17, 2010.
Senior Note Repurchases
The following table sets forth information regarding our debt repurchases over the past three years:
We may from time to time repurchase additional senior unsecured notes in open market purchases or privately negotiated transactions. Additionally, we may in the future prepay our term loan facility or other debt. The decision to repurchase senior unsecured notes or to prepay our term loan facility or other debt is based on prevailing market conditions, our liquidity requirements, contractual restrictions, and other factors. We may also consider refinancing or restructuring our existing debt obligations.