Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Dilutive and Anti-Dilutive Shares for Earnings per Share [Table Text Block]

The following table details the weighted-average dilutive and anti-dilutive securities related to stock options, RSUs, PSUs, and the 3.50% Senior Convertible Notes for the years presented:



	For the Years Ended December 31,
	2012	2011	2010
	(in thousands)
Dilutive	—	3,809	1,720
Anti-dilutive	2,102	—	—

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the calculations of basic and diluted earnings per share:



	For the Years Ended December 31,
	2012			2011		2010
	(in thousands, except per share amounts)
Net income (loss)	$	(54,249	)	$	215,416	$	196,837
Basic weighted-average common shares outstanding	65,138			63,755		62,969
Add: dilutive effect of stock options, unvested RSUs, and contingent PSUs	—			2,592		1,720
Add: dilutive effect of 3.50% Senior Convertible Notes	—			1,217		—
Diluted weighted-average common shares outstanding	65,138			67,564		64,689
Basic net income (loss) per common share	$	(0.83	)	$	3.38	$	3.13
Diluted net income (loss) per common share	$	(0.83	)	$	3.19	$	3.04

Schedule of Comprehensive Income (Loss) [Table Text Block]

The changes in the balances of components comprising other comprehensive income (loss) are presented in the following table:



	Change in Derivative Instrument Fair Value			Derivative Reclassification to Earnings			Pension Liability Adjustments
	(in thousands)
For the year ended December 31, 2010
Before tax income (loss)	$	26,904		$	10,608		$	(1,570	)
Tax benefit (expense)	(10,093		)	(3,967		)	590
Income (loss), net of tax	$	16,811		$	6,641		$	(980	)
For the year ended December 31, 2011
Before tax income (loss)	$	—		$	20,707		$	(2,779	)
Tax benefit (expense)	—			(7,710		)	984
Income (loss), net of tax	$	—		$	12,997		$	(1,795	)
For the year ended December 31, 2012
Before tax (loss)	$	—		$	(3,865	)	$	(3,909	)
Tax benefit	—			1,601			1,439
(Loss), net of tax	$	—		$	(2,264	)	$	(2,470	)

- Definition

Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

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