Comprehensive Income (Details) (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net income	$ 32,942	$ 24,795	$ 86,209	$ 61,390
Foreign currency translation adjustments	(34,142)	20,479	(17,919)	8,287
Changes in pension and other postretirement benefits, net of tax	41	35	(84)	309
Comprehensive (loss)/income	(972)	44,554	68,838	67,253
Change in pension and other postretirement benefits, tax (provision)/benefit	(23)	(20)	48	(176)
Interest Rate Swap [Member]
Net unrealized gain/(loss) on qualifying cash flow hedges, net of tax	187	(755)	632	(2,733)
Net unrealized loss on qualifying cash flow hedges, tax (provision)/benefit	$ (107)	$ 429	$ (359)	$ 1,554

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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- Definition

Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.

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