Debt (Tables)

9 Months Ended

Sep. 30, 2014

Debt Instruments [Abstract]

Schedule of Long-term Debt Instruments

The following table presents the carrying amounts and estimated fair values of the Company's total indebtedness at September 30, 2014 and December 31, 2013 (in thousands):

	September 30, 2014					December 31, 2013
	Carrying Amount			Fair Value		Carrying Amount			Fair Value
1.75% Convertible Senior Subordinated Notes due 2015	$	98,818				$	379,500
Unamortized discount on 1.75% Convertible Senior Subordinated Notes due 2015	(2,684		)			(34,079		)
1.75% Convertible Senior Subordinated Notes due 2015, net	$	96,134		$	97,802	$	345,421		$	372,481
7.00% Senior Notes due 2019	499,875			522,369		500,000			536,563
7.00% Senior Notes due 2020	$	400,000				$	400,000
Unamortized initial purchaser’s discount	(2,339		)			(2,800		)
7.00% Senior Notes due 2020, net	$	397,661		419,500		$	397,200		430,500
7.25% Senior Notes due 2022	400,000			421,750		400,000			431,750
5.75% Senior Notes due 2022	700,000			692,563		700,000			703,500
5.375% Senior Notes due 2023	750,000			717,188		—			—
3.25% AMS Convertible Notes due 2036	22			22		22			22
4.00% AMS Convertible Notes due 2041	99			99		111			111
Term Loan A Facility Due 2019	1,079,375			1,078,269		—			—
Term Loan B Facility Due 2021	422,875			419,555		—			—
Term Loan A Facility Due 2018	—			—		1,335,469			1,335,345
Term Loan B Facility Due 2018	—			—		60,550			60,686
Paladin debt	26,497			26,545		—			—
Total long-term debt, net	$	4,372,538		$	4,395,662	$	3,738,773		$	3,870,958
Less current portion, net	153,229			150,298		414,929			441,989
Total long-term debt, less current portion, net	$	4,219,309		$	4,245,364	$	3,323,844		$	3,428,969