Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Accrued Expenses and Other Current Liabilities [Line Items]
Employee benefits, payroll and related taxes	$ 39,442		$ 67,452
Taxes other than income taxes and payroll taxes	25,025		19,862
Deferred revenue	13,955		18,819
Accrued sales commissions	7,893		9,525
Accrued interest payable	7,816		8,075
Accrued utilities	9,108		7,493
Reduction in force accruals	14,428	[1]	2,843	[1]	3,845
Other	59,879		41,188
Total	$ 177,546		$ 175,257

[1] See Note 19, "Special Items."