Outstanding Derivatives Contracts (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2010 Year Investment		Jun. 30, 2011 Year Investment
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts	66		21
Contract Notional Amounts	$ 597,970		$ 375,750
Fair Value Asset (Liability)	(5,449)	[1]	(6,875)	[1]
Unrealized Loss Recorded in OCI	(1,261)		(3,000)
Designated as Hedging Instrument | Interest rate swap contracts | Accrued Liabilities Current
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts			1	[2]
Contract Notional Amounts			200,000	[2]
Fair Value Asset (Liability)			(4,988)	[1],[2]
Unrealized Loss Recorded in OCI			(3,000)	[2]
Designated as Hedging Instrument | Interest rate swap contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts	1	[2]
Contract Notional Amounts	200,000	[2]
Fair Value Asset (Liability)	(2,101)	[1],[2]
Unrealized Loss Recorded in OCI	(1,261)	[2]
Interest rate swap contracts | Accrued Liabilities Current
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts			2	[3]
Contract Notional Amounts			92,250	[3]
Fair Value Asset (Liability)			(1,556)	[1],[3]
Interest rate swap contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts	2	[3]
Contract Notional Amounts	147,750	[3]
Fair Value Asset (Liability)	(3,966)	[1],[3]
Foreign currency forward contracts, net | Accrued Liabilities Current
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts			18	[4]
Contract Notional Amounts			83,500	[4]
Fair Value Asset (Liability)			(331)	[1],[4]
Foreign currency forward contracts, net | Other Current Assets
Derivatives, Fair Value [Line Items]
Number of Outstanding Contracts	63	[4]
Contract Notional Amounts	250,220	[4]
Fair Value Asset (Liability)	$ 618	[1],[4]

[1] See Note 11 - Fair Value Disclosures for the determination of the fair value of these instruments.

[2] The Company entered into this swap on December 22, 2010. The Company designated and accounts for this swap as a cash flow hedge of the forecasted interest payments on borrowings (see Note 7 - Debt). As a result, changes in fair value of this swap are recognized in Other Comprehensive Income ("OCI"), net of tax.

[3] Changes in fair value of these swaps are recognized in earnings. Both swaps mature in January 2012.

[4] The Company has foreign exchange transaction risk since it typically enters into transactions in the normal course of business that are denominated in foreign currencies that differ from the local functional currencies. The Company enters into short-term foreign currency forward exchange contracts to offset the economic effects of these foreign currency transaction risks. These contracts are accounted for at fair value with realized and unrealized gains and losses recognized in Other income (expense), net since the Company does not designate these contracts as hedges for accounting purposes. All of the outstanding contracts at June 30, 2011 matured by the end of July 2011.