CONSOLIDATED STATEMENT OF SHAREHOLDERS EQUITY (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Tax effect of gain (losses) on derivatives qualifying as hedges	$ (2,526)	$ 429	$ 1,327
Tax effect of pension liability and postretirement adjustment	$ 36,554	$ 22,778	$ 11,696
Cash dividends declared, per share	$ 1.72	$ 1.46	$ 1.30