Consolidated Statements Of Changes In Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Amortization of pension and other post-retirement prior service cost, tax	$ 161	$ 7	$ 111
Changes in market value of derivative financial instruments, tax	$ 3,661	$ 2,884	$ 229
Exercise of options, shares tendered for payment	45,123	182,270	27,177

Tax effect, net of reclassifications adjustments, of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges, which is attributable to the parent entity. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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+ Details