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Comprehensive Income Parentheticals (USD $) In Thousands	3 Months Ended		6 Months Ended
Comprehensive Income Parentheticals (USD $) In Thousands	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Comprehensive Income Parenthetical [Abstract]
Net unrealized loss on qualifying cash flow hedges, tax (provision)/benefit	$ 140	$ 693	$ (253)	$ 1,125
Changes in pension and other postretirement benefits, tax (provision)/benefit	$ (26)	$ (20)	$ 71	$ (156)

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. 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

Total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. 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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