Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Payables and Accruals [Abstract]
Employee benefits, payroll and related taxes	$ 49,072		$ 42,035
Taxes other than income taxes and payroll taxes	10,101		9,747
Deferred revenue	10,370		17,896
Current deferred tax liabilities	6,806	[1]	2,853	[1]
Accrued sales commissions	7,768		7,241
Accrued interest payable	13,212		7,716
Accrued utilities	7,510		8,608
Reduction in force accruals	4,039	[2]	39,104	[2]	14,428
Accrual related to termination of manufacturing contract	15,777	[2]	0	[2]
Other	41,519		41,216
Total	$ 166,174		$ 176,416

[1] See Note 19, “Income Taxes.”

[2] See Note 20, “Restructuring and Other.”