Debt (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Debt Instrument Redemption

The Company had the following senior notes outstanding as of March 31, 2015:

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:	March 31, 2015			December 31, 2014
Principal amount of debt component	$	15,628		$	16,228
Unamortized discount	(476		)	(564		)
Carrying amount of debt component	$	15,152		$	15,664
Carrying amount of equity component	$	(33,536	)	$	(33,160	)
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	$	7,661		$	10,432

	Three months ended March 31,
Statements of Operations:	2015		2014
6.00% Convertible Guaranteed Notes
Coupon interest	$	236	$	428
Discount amortization	67		121
	$	303	$	549