Components of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]
Payroll and related items	$ 56,395	$ 51,728
Management incentive compensation	12,531	17,402
Income taxes payable	9,697	8,456
Deferred income taxes	306	167
Insurance	6,861	6,495
Warranty	4,865	4,417
Deferred revenue	16,147	7,954
Restructuring	5,628	5,875
Liability for uncertain tax positions	1,696	1,061
Accrued interest	9,439	1,424
Contingent consideration for acquisition	4,355	1,500
Other	26,637	24,217
Total accrued expenses	$ 154,557	$ 130,696