CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash dividends declared, Common, per share	$ 0.82	$ 0.82	$ 0.82
Translation adjustments, deferred income taxes	$ (5,924)	$ (5,436)	$ 2,504
Cash flow hedging instrument adjustments, deferred income taxes	(1,410)	567	(2,101)
Pension liability adjustments, deferred income taxes	(11,095)	7,572	19,143
Marketable securities unrealized gains (losses), deferred income taxes	$ (18)	$ (3)	$ 7
Stock options exercised, net, shares	20,000	38,900	157,058
Stock Issued During Period, Shares, Restricted Stock Award Net of Forfeitures and Tax Obligations Settled in Shares	74,297	68,558	92,630
Treasury shares repurchased, shares			0
Treasury Stock [Member]
Treasury shares repurchased, shares	0	0	286,577