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Differences between Statutory Federal Income Tax Rate and Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	2.70%	1.00%	0.90%
Valuation allowance	(231.70%)	41.30%	8.80%
Domestic production deduction	(1.20%)	0.00%	0.00%
Bad debt deduction	0.00%	(24.90%)	0.00%
Asset dispositions and write-offs	(3.00%)	(29.50%)	0.00%
Repatriation effects	1.50%	0.00%	0.00%
Tax reserves	0.00%	(1.00%)	4.10%
R&D tax credits	(1.50%)	0.00%	(4.10%)
Foreign tax rate effects	(4.40%)	(7.20%)	(22.50%)
Other, net	0.30%	0.40%	(1.10%)
Effective income tax rate	(202.30%)	15.10%	21.10%

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