Debt (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

The fair value of the Company’s fixed-rate debt facilities, excluding the previously disclosed swap values, is based on quoted market prices (Level II) and is summarized as follows (in thousands):

Fair Value of Financial Instruments
	September 30, 2013				December 31, 2012
Financial Instrument	Book Value		Market Value		Book Value		Market Value
7.75% senior subordinated notes, due 2020	$	400,000	$	441,300	$	550,000	$	614,600
3.75% convertible senior subordinated notes, due 2025
Carrying value	86,769		—		204,608		—
Unamortized debt discount	45,648		—		113,446		—
Principal amount	132,417		279,600		318,054		459,600
4.00% junior subordinated convertible debentures, due 2033
Carrying value	208,349		—		206,266		—
Unamortized debt discount	136,651		—		138,734		—
Principal amount	345,000		470,800		345,000		331,600
3.25% convertible senior debentures, due 2035
Carrying value	389,180		—		377,782		—
Unamortized debt discount	38,320		—		49,718		—
Principal amount	427,500		453,200		427,500		425,400
3.75% convertible senior subordinated notes, due 2042
Carrying value	224,572		—		229,624		—
Unamortized debt discount	165,428		—		160,376		—
Principal amount	390,000		549,700		390,000		397,100
3.50% convertible senior subordinated notes, due 2044
Carrying value	216,207		—		—		—
Unamortized debt discount	208,043		—		—		—
Principal amount	424,250		403,000		—		—

Summary of Debt

A summary of debt follows (in thousands):

	September 30, 2013			December 31, 2012
Revolving credit facility	$	—		$	—
Senior term loan, due 2017	403,750			419,688
7.75% senior subordinated notes, due 2020	400,000			550,000
3.75% convertible senior subordinated notes, due 2025	132,417			318,054
4.00% junior subordinated convertible debentures, due 2033	345,000			345,000
3.25% convertible senior debentures, due 2035	427,500			427,500
3.75% convertible senior subordinated notes, due 2042	390,000			390,000
3.50% convertible senior subordinated notes, due 2044	424,250			—
Capitalized lease and other debt obligations	22,594			23,685
Subtotal	2,545,511			2,473,927
Add interest rate swap agreements	23,570			46,090
(Subtract) unamortized debt discount	(594,090		)	(462,274		)
(Subtract) current portion of debt	(548,519		)	(27,713		)
Total long-term debt, net	$	1,426,472		$	2,030,030

Convertible debt and related equity

Information relating to the Company's convertible securities at September 30, 2013 is in the following table:

Convertible Debt	Carrying Value of Equity Component (in thousands)		Remaining Amortization Period	Effective Interest Rate
3.75% convertible senior subordinated notes, due 2025	$	11,437	12.25	8.25	%
4.00% junior subordinated convertible debentures, due 2033	$	151,665	19.75	8.01	%
3.25% convertible senior debentures, due 2035	$	245,433	2.25	7.63	%
3.75% convertible senior subordinated notes, due 2042	$	167,941	28.50	7.11	%
3.50% convertible senior subordinated notes, due 2044	$	208,200	30.40	7.70	%