Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands	Jun. 30, 2011		Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	$ 25,904		$ 24,731
Liabilities measured at fair value on a recurring basis	6,875		6,067
Interest rate swap contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value on a recurring basis	6,544	[1]	6,067	[1]
Foreign currency forward contracts, net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis			618	[2]
Liabilities measured at fair value on a recurring basis	331	[2]
Deferred compensation assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a recurring basis	$ 25,904	[3]	$ 24,113	[3]

[1] The Company has three interest rate swap contracts (see Note 10-Derivatives and Hedging). To determine the fair value of the swaps, the Company relies on mark-to-market valuations prepared by third-party brokers based on observable interest rate yield curves. Accordingly, the fair value of the swaps is determined under a Level 2 input.

[2] The Company enters into foreign currency exchange forward contracts to hedge the effects of adverse fluctuations in foreign currency exchange rates (see Note 10-Derivatives and Hedging). Valuation of the foreign currency forward contracts is based on foreign currency exchange rates in active markets; thus the Company measures the fair value of these contracts under a Level 2 input.

[3] The Company has two supplemental deferred compensation arrangements for the benefit of certain highly compensated officers, managers and other key employees. The assets consist of investments in money market and mutual funds, and company-owned life insurance. The money market and mutual funds consist of cash equivalents or securities traded in active markets, which the Company considers the fair value of these assets to be based on a Level 1 input. The value of the Company-owned life insurance is based on indirectly observable prices, which the Company considers to be a Level 2 input.