The company recently completed its previously announced redemption of the entire outstanding principal amount of US$600 million of its 7.0% Senior Notes due January 2021 (the 'Notes'). The redemption price for the Notes was 103.5% of the principal amount outstanding, which included the make-whole premium for the early redemption of the Notes as determined in accordance with the indenture governing the Notes. The company also paid accrued and unpaid interest on the Notes through September 19, 2016, the redemption date.