Note 11. Convertible Senior Notes due 2016

In August 2009, the Company issued $230.0 million aggregate principal amount of 4.0% convertible senior notes due 2016, or the 2016 Notes. The 2016 Notes will mature on August 15, 2016 unless earlier redeemed or repurchased by the Company or converted. The 2016 Notes bear interest at a rate of 4.0% per year, payable semi-annually in arrears on February 15 and August 15 of each year, commencing on February 15, 2010.

The 2016 Notes are general unsecured senior obligations of the Company and rank equally in right of payment with all of the Company’s future senior unsecured indebtedness, if any, and senior in right of payment to the Company’s future subordinated debt, if any.

Under certain circumstances and during certain periods, the 2016 Notes may be convertible, at an initial conversion rate of 25.2207 shares of common stock per $1,000 principal amount of the 2016 Notes, which is equivalent to an initial conversion price of approximately $39.65 per share of common stock. The conversion rate is subject to adjustment in certain circumstances. Upon conversion of a 2016 Note, the Company may deliver, at its election, shares of common stock, cash or a combination of cash and shares of common stock.

Upon the occurrence of certain fundamental changes involving the Company, holders of the 2016 Notes may require the Company to repurchase all or a portion of their 2016 Notes for cash at a price equal to 100% of the principal amount of the 2016 Notes to be purchased, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date.

Beginning August 20, 2013, the Company may redeem all or part of the outstanding 2016 Notes, provided that the last reported sale price of the common stock for 20 or more trading days in a period of 30 consecutive trading days ending on the trading day prior to the date the Company provides the notice of redemption to holders of the 2016 Notes exceeds 130% of the conversion price in effect on each such trading day. The redemption price will equal 100% of the principal amount of the 2016 Notes to be redeemed, plus all accrued and unpaid interest, plus a “make-whole premium” payment. The Company must make the make-whole premium payments on all 2016 Notes called for redemption prior to August 15, 2016, including the 2016 Notes converted after the date the Company delivered the notice of redemption.

The 2016 Notes are accounted for in accordance with ASC Subtopic 470-20, Debt with Conversion and Other Options. Under ASC Subtopic 470-20, issuers of certain convertible debt instruments that have a net settlement feature and may be settled in cash upon conversion, including partial cash settlement, are required to separately account for the liability (debt) and equity (conversion option) components of the instrument. The carrying amount of the liability component of any outstanding debt instrument is computed by estimating the fair value of a similar liability without the conversion option. The amount of the equity component is then calculated by deducting the fair value of the liability component from the principal amount of the convertible debt instrument.

The following is a summary of the equity and liability components of the 2016 Notes as of June 30, 2013:

	June 30, 2013
	(In thousands)
Carrying amount of the equity component	$	89,468
Net carrying amount of the liability component	$	91,232
Unamortized discount of the liability component	$	49,295

The effective interest rate used in determining the liability component of the 2016 Notes was 12.5%. The application of ASC 470-20 resulted in an initial recognition of $89.5 million as the debt discount with a corresponding increase to paid-in capital, the equity component, for the 2016 Notes. The debt discount and debt issuance costs are amortized as interest expense through August 2016. For the three months and six months ended June 30, 2013, interest expense was $2.3 million and $4.6 million, respectively, compared to $2.3 million and $4.6 million for the same periods in 2012, relating to the 4.0% stated coupon rate. The non-cash interest expense relating to the amortization of the debt discount for the three months and six months ended June 30, 2013 was $3.2 million and $6.3 million, respectively, compared to $2.8 million and $5.6 million for the same periods in 2012. The estimated fair value of the Company’s senior notes as of June 30, 2013 was $520.5 million.

As a result of the Company stock price meeting certain criteria, the 2016 Notes were convertible for the period of January 1, 2013 to June 30, 2013. As of June 30, 2013, requests for five of the 2016 Notes had been submitted and settled for conversion with a face value of $5,000.