CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Thousands, unless otherwise specified	Total	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Common Stock Par Value	Treasury Stock	Capital in Excess of Par Value	Non-Controlling Interest
Balance at Dec. 31, 2012	$ 1,380,498	$ 1,513,558	$ 60,683	$ 840	$ (625,401)	$ 430,210	$ 608
Increase (Decrease) in Stockholders' Equity
Net income (loss)	39,978	40,029					(51)
Foreign currency translation adjustments	(35,613)		(35,614)				1
Changes in unrecognized pension gains/losses and related amortization, net of tax	1,179		1,179
Changes in treasury locks, net of tax	15		15
Stock option exercises & restricted stock vestings	28,974			5	1	28,968
Cash dividends declared on common stock	(16,493)	(16,493)
Treasury stock purchased	(10,768)				(10,768)
Balance at Mar. 31, 2013	1,387,770	1,537,094	26,263	845	(636,168)	459,178	558
Balance at Dec. 31, 2013	1,480,308	1,619,419	109,751	853	(744,213)	493,947	551
Increase (Decrease) in Stockholders' Equity
Net income (loss)	48,408	48,389					19
Foreign currency translation adjustments	563		573				(10)
Changes in unrecognized pension gains/losses and related amortization, net of tax	718		718
Changes in treasury locks, net of tax	6		6
Stock option exercises & restricted stock vestings	18,248			2	1	18,245
Cash dividends declared on common stock	(16,366)	(16,366)
Treasury stock purchased	(12,999)				(12,999)
Balance at Mar. 31, 2014	$ 1,518,886	$ 1,651,442	$ 111,048	$ 855	$ (757,211)	$ 512,192	$ 560