Debt Arrangements (Tables)

12 Months Ended

Dec. 31, 2015

Net Carrying Amount of Debt

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

	December 31, 2015		December 31, 2014
Senior Secured Notes	$	712,907	$	774,030
1.50% Convertible Notes		357,453		339,943
2.50% Convertible Notes		294,048		280,104
Variable Funding Note		100,000		—
Total	$	1,464,408	$	1,394,077

Company's Debt Maturities on Calendar Year Basis

As of December 31, 2015, the Company’s debt maturities on a calendar year basis are as follows:

	Total		2016		2017		2018		2019		2020		Thereafter
Senior Secured Notes	$	712,907	$	61,123	$	61,123	$	61,123	$	61,123	$	61,123	$	407,292
1.50% Convertible Notes (1)	$	357,453		—		—		357,453		—		—		—
2.50% Convertible Notes  (2) (3)	$	294,048		294,048		—		—		—		—		—
Variable Funding Notes	$	100,000		—		—		100,000		—		—		—
Total	$	1,464,408	$	355,171	$	61,123	$	518,576	$	61,123	$	61,123	$	407,292

(1) Reflects the net debt carrying amount of the 1.50% Convertible Notes in the consolidated balance sheet as of December 31, 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 December 31, 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.

(3) In March 2016, the Company entered in to a long-term refinancing arrangement with CF ICX LLC and Fortress Credit Co LLC for an aggregate principal amount of $300 million (refer to Note 19 for further details) in which the proceeds are to be used to pay off the 2.50% Convertible Notes.  In accordance with ASC 470, as the terms of the refinancing are readably determinable and the term of the credit agreement is five years (scheduled to mature on March 7, 2021), the Company has classified the 2.50% Convertible Notes as long-term debt on its December 31, 2015 consolidated balance sheet.

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

Details of Convertible Notes Reflected on Consolidated Balance Sheet

As of December 31, 2015 and December 31, 2014, the amount of the 1.50% Convertible Notes accounted for as a liability was approximately $357.5 million and $339.9 million, respectively, and is reflected on the consolidated balance sheets as follows:

	December 31, 2015		December 31, 2014
Equity component carrying amount	$	49,931	$	49,931
Unamortized discount		42,547		60,057
Net debt carrying amount	$	357,453	$	339,943

Convertible Notes | 2.50% Senior Subordinated Notes Due June 2016

Details of Convertible Notes Reflected on Consolidated Balance Sheet

As of December 31, 2015 and December 31, 2014, the amount of the 2.50% Convertible Notes accounted for as a liability was approximately $294.0 million and $280.1 million, respectively, and is reflected on the consolidated balance sheets as follows:

	December 31, 2015		December 31, 2014
Equity component carrying amount	$	35,996	$	35,996
Unamortized discount		5,952		19,896
Net debt carrying amount	$	294,048	$	280,104