Note 9.

Senior Notes

On October 4, 2013, our Company completed a public debt offering of $265 million principal amount of 5.75% Senior Notes (“5.75% Senior Notes”) and received net proceeds of $263 million. The Principal amount of the 5.75% Senior Notes is payable in one single installment on October 15, 2023. Our Company used a portion of the proceeds of the 5.75% Senior Notes for the redemption of the 7.0% Senior Notes due May 1, 2016 (“7.0% Senior Notes”). Our Company incurred a charge of $17.9 million for the payment of call premium in connection with the redemption of the 7.0% Senior Notes. The 5.75% Senior Notes Liability as of December 31, 2014 and 2013 was $263.4 million and $263.3 million, respectively. The unamortized discount as of December 31, 2014 and 2013 was $1.6 million and $1.7 million, respectively.

The fair value of the 5.75% Senior Notes was $285.7 million and $277.6 million as of December 31, 2014 and December 31, 2013, respectively. The fair values were determined using quoted prices for similar instruments in active markets and is classified as Level 2 within the fair value hierarchy as defined by the accounting guidance for fair value measurements.

Interest is payable on the 5.75% Senior Notes each April 15 and October 15. The effective interest rate related to the 5.75% Senior Notes, based on the proceeds net of discount and all issuance costs, approximates 5.86%. Interest expense on the 5.75% was $15.4 million for the year ended December 31, 2014. Interest expense on the 5.75% Senior Notes and 7.0% Senior Notes totaled $10.5 million for the year ended December 31, 2013. Interest expense on the 7.0% Senior Notes was $8.2 million for the year ended December 31, 2012.

The interest rate payable on the 5.75% Senior Note is subject to a tiered adjustment based on defined changes in our Company’s debt ratings. Our Company may redeem the 5.75% Senior Notes in whole at any time or in part from time to time at a make-whole redemption price. The 5.75% Senior Notes are our Company’s only senior unsecured obligation and will rank equally with future senior unsecured indebtedness.

The terms of the 5.75%, Senior Notes contain various restrictive business and financial covenants, including a restriction on indebtedness, and other restrictions typical for debt obligations of this type, including limitations on mergers, liens and dispositions of the common stock of certain subsidiaries. As of December 31, 2014, our Company was in compliance with all such covenants.