Income Taxes (Tables)

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Summary of Effective Income Tax Rate

The effective income tax rate, which is provision for (benefit from) income taxes as a percentage of income (loss) before provision for (benefit from) income taxes and equity income, differs from the amount determined by applying the applicable U.S. statutory federal income tax rate to pretax results primarily as a result of the following:

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Statutory provision rate		35.0	%		35.0	%		35.0	%		35.0	%
Permanent differences and other items
State tax provision		(5.4	%)		4.0	%		19.2	%		1.2	%
Section 199 manufacturing credit		5.0	%		(1.7	%)		(16.4	%)		(0.5	%)
Return to provision adjustments / Uncertain tax positions		0.6	%		3.1	%		(2.5	%)		(69.0	%)
Non-deductible non-cash compensation		(92.0	%)		(36.2	%)		169.1	%		838.2	%
Other		(1.3	%)		0.4	%		2.0	%		(9.0	%)
Effective income tax rate		(58.1	%)		4.6	%		206.4	%		795.9	%