DEBT AND OTHER FINANCING ARRANGEMENTS

Senior Convertible Notes

In 2013, the Company issued senior convertible notes (the “Notes”) raising gross proceeds of $253.0 million.

The Notes are governed by an Indenture, dated June 17, 2013 (the “Indenture”), between the Company and U.S. Bank National Association, as trustee. The Notes mature on July 1, 2018, unless earlier repurchased or converted, and bear interest at a rate of 1.50% per year payable semi-annually in arrears on January 1 and July 1 of each year, commencing January 1, 2014.

The Notes are convertible at an initial conversion rate of 18.5046 shares of the Company’s common stock per $1,000 principal amount of the Notes, which represents an initial conversion price of approximately $54.04 per share, subject to adjustment for anti-dilutive issuances, voluntary increases in the conversion rate and make-whole adjustments upon a fundamental change. A fundamental change includes a change in control, delisting of the Company’s common stock and a liquidation of the Company. Upon conversion, the Company will deliver cash for the principal amount, and the Company has the right to settle any amounts in excess of the principal in cash or shares.

Prior to April 1, 2018, the Notes are only convertible upon satisfaction of certain conditions as follows:


•	during any calendar quarter after September 30, 2013, if the last reported sale price of common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;


•	during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the Notes for each trading day of that five consecutive trading day period was less than 98% of the product of the last reported sale price of common stock and the conversion rate on each such trading day; or


•	upon the occurrence of specified corporate events as defined in the Indenture.

Holders of the Notes may convert their Notes at any time on or after April 1, 2018, until the close of business on the second scheduled trading day immediately preceding the maturity date.

The holders of the Notes may require the Company to repurchase all or a portion of their Notes at a cash repurchase price equal to 100% of the principal amount of the Notes being repurchased, plus accrued and unpaid interest, upon a fundamental change and events of default, including non-payment of interest or principal and other obligations under the Indenture.

In accounting for the Notes at issuance, the Company separated the Notes into debt and equity components pursuant to the accounting standards for convertible debt instruments that may be fully or partially settled in cash upon conversion. The fair value of the debt component was estimated using an interest rate for nonconvertible debt, with terms similar to the Notes, excluding the conversion feature. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The excess of the principal amount of the Notes over the fair value of the debt component was recorded as a debt discount and a corresponding increase in additional paid-in capital. The debt discount is accreted to interest expense over the term of the Notes using the interest method. The amount recorded to additional paid-in capital is not to be remeasured as long as it continues to meet the conditions for equity classification. Upon issuance of the $253.0 million of Notes, the Company recorded $214.3 million to debt and $38.7 million to additional paid-in capital for the debt discount.

The Company incurred transaction costs of approximately $7.3 million related to the issuance of the Notes. In accounting for these costs, the Company allocated the costs to the debt and equity components in proportion to the allocation of proceeds from the issuance of the Notes to such components. Transaction costs allocated to the debt component of $6.2 million are deferred and amortized to interest expense over the term of the Notes. The transaction costs allocated to the equity component of $1.1 million were recorded to additional paid-in capital.

The net carrying amount of the liability component of the Notes as of December 31, 2016 and 2015 consists of the following (in thousands):



	December 31, 2016			December 31, 2015
Principal amount	$	253,000		$	253,000
Unamortized debt discount	(12,550		)	(20,417		)
Net carrying amount before unamortized debt issuance costs	240,450			232,583
Unamortized debt issuance costs	(2,015		)	(3,278		)
Net carrying value	$	238,435		$	229,305

The effective interest rate of the liability component of the Notes is 5.4%. This interest rate was based on the interest rates of similar liabilities at the time of issuance that did not have associated convertible features.

The following table presents the interest expense recognized related to the Notes for years ended December 31, 2016, 2015 and 2014 (in thousands):



	Year Ended December 31,		Year Ended December 31,		Year Ended December 31,
	2016		2015		2014
Contractual interest expense at 1.5% per annum	$	3,795	$	3,795	$	3,795
Amortization of debt issuance costs	1,263		1,202		1,145
Accretion of debt discount	7,867		7,489		7,129
Total	$	12,925	$	12,486	$	12,069

The net proceeds from the Notes were approximately $246.0 million after payment of the initial purchasers’ offering expenses. The Company used approximately $49.5 million of the net proceeds of the Notes offering to pay the cost of the Note Hedges described below, which was partially offset by $23.2 million of the proceeds from the Company’s sale of the Warrants also described below.

Note Hedges

Concurrent with the issuance of the Notes, the Company entered into note hedges (the “Note Hedges”) with certain bank counterparties, with respect to its common stock. The Company paid $49.5 million for the Note Hedges. The Note Hedges cover approximately 4.7 million shares of the Company’s common stock at a strike price of $54.04 per share, and are exercisable by the Company upon conversion of the Notes. The Note Hedges will expire upon the maturity of the Notes. The Note Hedges are intended to reduce the potential economic dilution upon conversion of the Notes in the event that the fair value per share of the Company’s common stock at the time of exercise is greater than the conversion price of the Notes.

Warrants

Separately and concurrently with the entry by the Company into the Note Hedges, the Company entered into warrant transactions, whereby it sold warrants to the same bank counterparties as the Note Hedges to acquire up to 4.7 million shares of the Company’s common stock at a strike price of $80.06 per share (the “Warrants”), subject to anti-dilution adjustments. The Company received proceeds of $23.2 million from the sale of the Warrants. The Warrants expire at various dates during 2018 and 2019. If the fair value per share of the Company’s common stock exceeds the strike price of the Warrants, the Warrants will reduce diluted earnings per share to the extent that the calculation does not have an anti-dilutive effect.

The amounts paid and received for the Note Hedges and the Warrants have been recorded in additional paid-in capital. The fair value of the Note Hedges and the Warrants are not remeasured through earnings each reporting period.