Components of Accrued Expenses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Payroll and related items	$ 60,747	$ 55,618
Management incentive compensation	16,473	15,974
Income taxes payable	10,460	10,284
Insurance	9,406	8,974
Warranty	4,811	4,875
Deferred revenue	10,699	9,682
Restructuring	608	10,887
Liability for uncertain tax positions	1,492	2,679
Accrued interest	9,144	1,713
Contingent consideration for acquisition	4,890	3,528
Other	26,505	25,962
Total accrued expenses	$ 155,235	$ 150,176