Debt (Tables)

6 Months Ended

Jun. 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
	June 30, 2013				December 31, 2012
Financial Instrument	Book Value		Market Value		Book Value		Market Value
7.75% senior subordinated notes, due 2020	$	550,000	$	606,900	$	550,000	$	614,600
3.75% convertible senior subordinated notes, due 2025
Carrying value	207,110		—		204,608		—
Unamortized debt discount	110,944		—		113,446		—
Principal amount	318,054		597,900		318,054		459,600
4.00% junior subordinated convertible debentures, due 2033
Carrying value	207,641		—		206,266		—
Unamortized debt discount	137,359		—		138,734		—
Principal amount	345,000		408,200		345,000		331,600
3.25% convertible senior debentures, due 2035
Carrying value	385,309		—		377,782		—
Unamortized debt discount	42,191		—		49,718		—
Principal amount	427,500		440,600		427,500		425,400
3.75% convertible senior subordinated notes, due 2042
Carrying value	230,476		—		229,624		—
Unamortized debt discount	159,524		—		160,376		—
Principal amount	390,000		487,100		390,000		397,100

Summary of Debt

A summary of debt follows (in thousands):

	June 30, 2013			December 31, 2012
Revolving credit facility	$	—		$	—
Senior term loan, due 2017	409,063			419,688
7.75% senior subordinated notes, due 2020	550,000			550,000
3.75% convertible senior subordinated notes, due 2025	318,054			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
Capitalized lease and other debt obligations	24,447			23,685
Subtotal	2,464,064			2,473,927
Add interest rate swap agreements	20,992			46,090
(Subtract) unamortized debt discount	(450,018		)	(462,274		)
(Subtract) current portion of debt	(443,514		)	(27,713		)
Total long-term debt, net	$	1,591,524		$	2,030,030

Convertible debt and related equity

Information relating to the Company's convertible securities at June 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	$	27,230	12.50	8.25	%
4.00% junior subordinated convertible debentures, due 2033	$	151,665	20.00	8.01	%
3.25% convertible senior debentures, due 2035	$	245,433	2.50	7.63	%
3.75% convertible senior subordinated notes, due 2042	$	161,600	28.75	7.11	%