Fair Value Disclosures (Detail) - Assets And Liabilities Measured At Fair Value On Recurring Basis (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Assets:
Assets measured at fair value on a recurring basis	$ 41,350		$ 38,302
Liabilities:
Liabilities measured at fair value on a recurring basis	41,530		38,089
Plan Assets [Member]
Assets:
Assets measured at fair value on a recurring basis	27,000	[1]	25,050	[1]
Pension Reinsurance Asset [Member]
Assets:
Assets measured at fair value on a recurring basis	14,350	[2]	12,980	[2]
Plan Liabilities [Memeber]
Liabilities:
Liabilities measured at fair value on a recurring basis	30,290	[1]	28,100	[1]
Foreign Currency Forward Contracts, Net [Member]
Assets:
Assets measured at fair value on a recurring basis		[3]	272	[3]
Liabilities:
Liabilities measured at fair value on a recurring basis	240	[3]		[3]
Interest Rate Swap Contracts [Member]
Liabilities:
Liabilities measured at fair value on a recurring basis	$ 11,000	[4]	$ 9,989	[4]

[1] The Company has a deferred compensation plan for the benefit of certain highly compensated employees. The assets consist of investments in money market and mutual funds, and company-owned life insurance contracts, all of which are valued based on Level 1 or Level 2 valuation inputs. The related deferred compensation plan liabilities are recorded at fair value, or the estimated amount needed to settle the liability, which the Company also considers to be based on a Level 2 input.

[2] The Company maintains a pension reinsurance asset to fund payments for one of its defined benefit pension plans. The reinsurance asset is carried at its cash surrender value, which the Company believes approximates its fair value. The Company considers the reinsurance contract to be valued based on a Level 2 input.

[3] The Company enters into foreign currency forward exchange contracts to hedge the effects of adverse fluctuations in foreign currency exchange rates. Valuation of the foreign currency forward contracts is based on observable foreign currency exchange rates in active markets, which the Company considers a Level 2 input.

[4] The Company has an interest rate swap contract which hedges the interest rate on its borrowings (see Note 7 - Debt). To determine the fair value of this over-the-counter financial instrument, the Company relies on a mark-to-market valuation prepared by a third-party broker. The valuation is based on observable interest rates from recently executed market transactions or broker quotes corroborated by other observable market data. Accordingly, the fair value of the swap is determined under a Level 2 input. The Company independently corroborates the reasonableness of the swap valuation prepared by the third-party broker through the use of an electronic quotation service.