CONSOLIDATED STATEMENT OF SHAREHOLDERS EQUITY (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Tax effect of gain (losses) on derivatives qualifying as hedges	$ 1,327	$ (3,504)	$ 639
Tax effect of pension liability and postretirement adjustment	$ 11,696	$ 33,171	$ (2,429)
Cash dividends declared, per share	$ 1.30	$ 1.16	$ 1.04