CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock Issued	Common Stock Treasury	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balances at Dec. 31, 2011	$ 1,219,918	$ 139,914	$ (744,644)	$ 149,066	$ 1,996,234	$ (364,191)	$ 43,539
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(29,572)				(29,369)		(203)
Cash dividends declared:
Common @ $0.205 per share	(16,525)				(16,525)
Translation adjustments, net of deferred income taxes of $9,055 and $(4,644) in 2013 and 2012, respectively	36,040					35,533	507
Cash flow hedging instrument adjustments, net of deferred income taxes of $(437) and $(215) in 2013 and 2012, respectively	762					762
Contributions from noncontrolling interests	7,935						7,935
Pension liability adjustments, net of deferred income taxes of $(4,091) and $793 in 2013 and 2012, respectively	(5,418)					(5,418)
Marketable securities unrealized gains, net of deferred income taxes of $(5) and $(4) for 2013 and 2012, respectively	7					7
Stock options exercised, 12,000 shares and 30,900 shares in 2013 and 2012, respectively	542	39		503
Vesting of restricted stock units and other, net 60,176 shares and 38,573 shares in 2013 and 2012, respectively	(140)	72	(427)	215
Amortization of unearned portion of stock-based compensation, net of forfeitures	477			477
Balances at Mar. 31, 2012	1,214,026	140,025	(745,071)	150,261	1,950,340	(333,307)	51,778
Balances at Dec. 31, 2012	861,624	140,080	(745,205)	152,645	1,675,490	(411,168)	49,782
Increase (Decrease) in Stockholders' Equity
Net income (loss)	9,072				7,245		1,827
Cash dividends declared:
Common @ $0.205 per share	(16,551)				(16,551)
Noncontrolling interests	(755)						(755)
Translation adjustments, net of deferred income taxes of $9,055 and $(4,644) in 2013 and 2012, respectively	(12,016)					(11,838)	(178)
Cash flow hedging instrument adjustments, net of deferred income taxes of $(437) and $(215) in 2013 and 2012, respectively	2,061					2,061
Contributions from noncontrolling interests	857						857
Purchase of subsidiary shares from noncontrolling interest	(185)			(292)			107
Pension liability adjustments, net of deferred income taxes of $(4,091) and $793 in 2013 and 2012, respectively	28,003					28,003
Marketable securities unrealized gains, net of deferred income taxes of $(5) and $(4) for 2013 and 2012, respectively	8					8
Stock options exercised, 12,000 shares and 30,900 shares in 2013 and 2012, respectively	238	15		223
Vesting of restricted stock units and other, net 60,176 shares and 38,573 shares in 2013 and 2012, respectively	1,342	116	(833)	2,059
Amortization of unearned portion of stock-based compensation, net of forfeitures	865			865
Balances at Mar. 31, 2013	$ 874,563	$ 140,211	$ (746,038)	$ 155,500	$ 1,666,184	$ (392,934)	$ 51,640