Schedule II-Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 50,542		$ 49,660		$ 44,482
Valuation Allowances and Reserves, Charged to Cost and Expense	16,728		16,367		16,619
Valuation Allowances and Reserves, Charged to Other Accounts	2,896		740		2,311
Valuation Allowances and Reserves, Deductions	9,221		16,225		13,752
Valuation Allowances and Reserves, Balance	60,945		50,542		49,660
Inventory Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	41,596		39,739		34,283
Valuation Allowances and Reserves, Charged to Cost and Expense	12,038		14,472		12,931
Valuation Allowances and Reserves, Charged to Other Accounts	1,948	[1]	782	[1]	1,751	[1]
Valuation Allowances and Reserves, Deductions	7,035	[2]	13,397	[2]	9,226	[2]
Valuation Allowances and Reserves, Balance	48,547		41,596		39,739
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	3,972		3,997		4,824
Valuation Allowances and Reserves, Charged to Cost and Expense	4,258		2,753		3,633
Valuation Allowances and Reserves, Charged to Other Accounts	836	[1]	50	[1]	66	[1]
Valuation Allowances and Reserves, Deductions	2,186	[3]	2,828	[3]	4,526	[3]
Valuation Allowances and Reserves, Balance	6,880		3,972		3,997
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	4,974		5,924		5,375
Valuation Allowances and Reserves, Charged to Cost and Expense	432		(858)		55
Valuation Allowances and Reserves, Charged to Other Accounts	112	[1]	(92)	[1]	494	[1]
Valuation Allowances and Reserves, Balance	$ 5,518		$ 4,974		$ 5,924

[1] This category comprised of two growth and two value-oriented portfolios of U.S. securities benchmarked against the S&P 500 index. 2010 also includes a minor holding of a U.S. equity index fund in Switzerland.

[2] Write-off and sale of obsolete inventory.

[3] Write-off of bad debt and collections on previously reserved accounts.