Debt (Tables)

6 Months Ended

Jun. 30, 2014

Debt Disclosure [Abstract]

Debt Instrument Redemption

The Company had the following senior notes outstanding as of June 30, 2014:

Issue Date	Face Amount		Interest Rate		Maturity Date	Issue Price
May 2014	$	250,000	4.40	%	June 2024	99.883	%
June 2013	250,000		4.25	%	June 2023	99.026	%
	$	500,000

Schedule of Long-term Debt Instruments

Below is a summary of additional disclosures related to the 6.00% Convertible Guaranteed Notes due 2030.

	6.00% Convertible Guaranteed Notes due 2030
Balance Sheets:	June 30, 2014			December 31, 2013
Principal amount of debt component	$	26,186		$	28,991
Unamortized discount	(1,132		)	(1,500		)
Carrying amount of debt component	$	25,054		$	27,491
Carrying amount of equity component	$	(27,564	)	$	(26,032	)
Effective interest rate	8.1		%	8.1		%
Period through which discount is being amortized, put date	01/2017			01/2017
Aggregate if-converted value in excess of aggregate principal amount	$	16,432		$	14,296

	Three months ended June 30,				Six months ended June 30,
Statements of Operations:	2014		2013		2014		2013
6.00% Convertible Guaranteed Notes
Coupon interest	$	393	$	610	$	821	$	1,398
Discount amortization	112		175		233		398
	$	505	$	785	$	1,054	$	1,796