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Income Taxes - Schedule of Reconciliation of Federal Statutory Rate to Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Statutory federal tax rate	(34.00%)	(34.00%)	35.00%
State income taxes, net of federal income tax benefit	1.10%	(9.40%)	3.40%
Tax credits	(8.10%)	0.60%	(4.00%)
U.S. manufacturing deduction	1.70%	(3.80%)	(2.00%)
Permanent items	0.60%	2.20%	0.50%
Book income attributable to noncontrolling interest	0.40%	6.80%	(1.40%)
Foreign rate differential and deferred items	(0.20%)	0.10%	0.60%
Increase (decrease) in tax reserves	(0.10%)	0.30%	0.60%
Increase in valuation allowance	53.30%	84.50%
Other	0.10%	(0.70%)	1.00%
Effective income tax rate	14.80%	46.60%	33.70%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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