Convertible Notes, Net	12 Months Ended
Dec. 31, 2015
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Convertible Notes, Net	8. CONVERTIBLE NOTES, NET In November 2013, we issued $172.5 million of 5.25% convertible senior notes due on December 1, 2018, or Convertible Notes. The Convertible Notes’ issuance costs are amortized through interest expense over the life of the Convertible Notes using the effective interest method. Including this amortization, our all-in cost of the Convertible Notes is 5.87% per annum. The Convertible Notes are convertible at the holders’ option into shares of our class A common stock, only under specific circumstances, prior to the close of business on August 31, 2018, at the applicable conversion rate in effect on the conversion date. Thereafter, the Convertible Notes are convertible at the option of the holder at any time until the second scheduled trading day immediately preceding the maturity date. The Convertible Notes were not convertible as of December 31, 2015. The conversion rate was initially set to equal 34.8943 shares of class A common stock per $1,000 principal amount of Convertible Notes, which was equivalent to an initial conversion price of $28.66 per share of class A common stock, subject to adjustment upon the occurrence of certain events. In the fourth quarter of 2015, as a result of exceeding the cumulative dividend threshold as defined in the Convertible Notes Supplemental Indenture, the conversion rate was adjusted to 35.2653 shares of Class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $28.36 per share of class A common stock. We may not redeem the Convertible Notes prior to maturity. As of December 31, 2015, the conversion option value was zero based on the price of our class A common stock of $26.76. In addition, we have the intent and ability to settle the Convertible Notes in cash. As a result, the Convertible Notes did not have any impact on our diluted earnings per share. Upon issuance of the Convertible Notes, we recorded a $9.1 million discount based on the implied value of the conversion option and an assumed interest rate of 6.50%, as well as $4.1 million of initial issuance costs. Including the amortization of this discount and the issuance costs, our total cost of the Convertible Notes is 7.16% per annum. During the year ended December 31, 2015, we incurred total interest on our convertible notes of $11.6 million, of which $9.1 million related to cash coupon and $2.5 million related to the amortization of discount and certain issuance costs. During the year ended December 31, 2014, we incurred total interest on our convertible notes of $11.5 million, of which $9.1 million related to cash coupon and $2.4 million related to the amortization of discount and certain issuance costs. During the year ended December 31, 2013, we incurred total interest on our convertible notes of $1.1 million, of which $874,000 related to cash coupon and $197,000 related to the amortization of discount and certain issuance costs. As of December 31, 2015, the Convertible Notes were carried on our consolidated balance sheet at $164.0 million, net of an unamortized discount of $8.2 million and deferred financing costs of $305,000. Accrued interest payable for the Convertible Notes was $755,000 as of December 31, 2015 and 2014. Refer to Note 2 for additional discussion of our accounting policies for the Convertible Notes.

8. CONVERTIBLE NOTES, NET

In November 2013, we issued $172.5 million of 5.25% convertible senior notes due on December 1, 2018, or Convertible Notes. The Convertible Notes’ issuance costs are amortized through interest expense over the life of the Convertible Notes using the effective interest method. Including this amortization, our all-in cost of the Convertible Notes is 5.87% per annum.

The Convertible Notes are convertible at the holders’ option into shares of our class A common stock, only under specific circumstances, prior to the close of business on August 31, 2018, at the applicable conversion rate in effect on the conversion date. Thereafter, the Convertible Notes are convertible at the option of the holder at any time until the second scheduled trading day immediately preceding the maturity date. The Convertible Notes were not convertible as of December 31, 2015. The conversion rate was initially set to equal 34.8943 shares of class A common stock per $1,000 principal amount of Convertible Notes, which was equivalent to an initial conversion price of $28.66 per share of class A common stock, subject to adjustment upon the occurrence of certain events. In the fourth quarter of 2015, as a result of exceeding the cumulative dividend threshold as defined in the Convertible Notes Supplemental Indenture, the conversion rate was adjusted to 35.2653 shares of Class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to a conversion price of $28.36 per share of class A common stock. We may not redeem the Convertible Notes prior to maturity. As of December 31, 2015, the conversion option value was zero based on the price of our class A common stock of $26.76. In addition, we have the intent and ability to settle the Convertible Notes in cash. As a result, the Convertible Notes did not have any impact on our diluted earnings per share.

Upon issuance of the Convertible Notes, we recorded a $9.1 million discount based on the implied value of the conversion option and an assumed interest rate of 6.50%, as well as $4.1 million of initial issuance costs. Including the amortization of this discount and the issuance costs, our total cost of the Convertible Notes is 7.16% per annum. During the year ended December 31, 2015, we incurred total interest on our convertible notes of $11.6 million, of which $9.1 million related to cash coupon and $2.5 million related to the amortization of discount and certain issuance costs. During the year ended December 31, 2014, we incurred total interest on our convertible notes of $11.5 million, of which $9.1 million related to cash coupon and $2.4 million related to the amortization of discount and certain issuance costs. During the year ended December 31, 2013, we incurred total interest on our convertible notes of $1.1 million, of which $874,000 related to cash coupon and $197,000 related to the amortization of discount and certain issuance costs.

As of December 31, 2015, the Convertible Notes were carried on our consolidated balance sheet at $164.0 million, net of an unamortized discount of $8.2 million and deferred financing costs of $305,000. Accrued interest payable for the Convertible Notes was $755,000 as of December 31, 2015 and 2014. Refer to Note 2 for additional discussion of our accounting policies for the Convertible Notes.