Debt Arrangements (Tables)

9 Months Ended

Sep. 30, 2015

Net Carrying Amount of Debt

The Company’s net carrying amount of debt is comprised of the following:

	September 30, 2015		December 31, 2014
Senior Secured Notes	$	728,189	$	774,030
1.50% Convertible Notes		353,032		339,943
2.50% Convertible Notes		290,421		280,104
Variable Funding Note		100,000		—
Total	$	1,471,642	$	1,394,077

Company's Debt Maturities on Calendar Year Basis

As of September 30, 2015, the Company’s debt maturities on a calendar year basis are as follows:

	Total		Oct 1 through December 31, 2015		2016		2017		2018		2019		Thereafter
Senior Secured Notes	$	728,189	$	15,282	$	61,123	$	61,123	$	61,123	$	61,123	$	468,415
1.50% Convertible Notes(1)	$	353,032		—		—		—		353,032				—
2.50% Convertible Notes(2)	$	290,421		—		290,421		—		—		—		—
Variable Funding Notes	$	100,000								100,000
Total	$	1,471,642	$	15,282	$	351,544	$	61,123	$	514,155	$	61,123	$	468,415

⁽¹⁾ Reflects the net debt carrying amount of the 1.50% Convertible Notes in the consolidated balance sheet as of September 30, 2015, in accordance with accounting for convertible notes. The principal amount owed to the holders of the 1.50% Convertible Notes is $400.0 million.

⁽²⁾ Reflects the net debt carrying amount of the 2.50% Convertible Notes in the consolidated balance sheet as of September 30, 2015, in accordance with accounting for convertible notes. The principal amount owed to the holders of the 2.50% Convertible Notes is $300.0 million.

Convertible Notes | 1.50% Senior Subordinated Notes Due March 15, 2018

Details of Convertible Notes Reflected on Consolidated Balance Sheet

As of September 30, 2015 and December 31, 2014, the amount of the 1.50% Convertible Notes accounted for as a liability was approximately $353.0 million and $339.9 million, respectively, and is reflected on the consolidated balance sheet as follows:

	September 30, 2015		December 31, 2014
Equity component carrying amount	$	49,931	$	49,931
Unamortized discount		46,967		60,057
Net debt carrying amount		353,032		339,943

Convertible Notes | 2.50% Senior Subordinated Notes Due June 2016

Details of Convertible Notes Reflected on Consolidated Balance Sheet

As of September 30, 2015 and December 31, 2014, the amount of the 2.50% Convertible Notes accounted for as a liability was approximately $290.4 million (which is included in current portion of long-term debt) and $280.1 million, respectively, and is reflected on the consolidated balance sheet as follows:

	September 30, 2015		December 31, 2014
Equity component carrying amount	$	35,996	$	35,996
Unamortized discount		9,579		19,896
Net debt carrying amount		290,421		280,104