Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

Carrying Amount of Components of Long-term Debt

following table summarizes our long-term debt as of the dates presented:

	As of December 31,
	2012		2011
Revolving credit facility	$	—	$	99,000
Senior notes due 2016, net of discount (principal amount of $300,000)	294,759		293,561
Senior notes due 2019	300,000		300,000
Convertible notes due 2012, net of discount (principal amount of $4,915)	—		4,746
	594,759		697,307
Less: Current portion of long-term debt	—		(4,746		)
	$	594,759	$	692,561

Schedule of Maturities of Long-term Debt

The following table sets forth the aggregate maturities of the principal amounts, excluding discounts, of our long-term debt for the next five years and thereafter: 

Year	Amounts
2013	$	—
2014	—
2015	—
2016	300,000
2017	—
Thereafter	300,000
Total	$	600,000