Income Taxes - Federal Statutory Corporate Tax Rate Reconciles to Our Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Effective Income Tax Rate Reconciliation [Line Items]
Statutory U.S. federal tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	(0.70%)	0.40%	0.60%
Foreign earnings taxed at lower effective rates	(0.60%)	(7.50%)	(9.20%)
Nondeductible acquisition costs		2.70%
U.S. domestic manufacturing deduction		(2.60%)	(1.10%)
Impairment	(20.20%)
Net change in unrecognized tax benefits	2.00%	0.40%
Other	(1.50%)	1.60%	0.20%
Effective income tax rate	14.00%	30.00%	25.50%