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)	(16,299)				(16,658)		359
Cash dividends declared:
Common @ $0.41 per share	(33,058)				(33,058)
Noncontrolling interests	(2,068)						(2,068)
Translation adjustments, net of deferred income taxes of $7,555 and $2,357 for the six months ended June 30, 2013 and 2012, respectively	(31,079)					(30,708)	(371)
Cash flow hedging instrument adjustments, net of deferred income taxes of $769 and $(895) in 2013 and 2012, respectively	2,701					2,701
Contributions from noncontrolling interests	8,490						8,490
Pension liability adjustments, net of deferred income taxes of $(457) and $(4,548), and $(2,118) and $(1,325) for the three and six months ended June 30, 2013 and 2012, respectively	8,849					8,849
Marketable securities unrealized gains, net of deferred income taxes of $(5) and $(1) for 2013 and 2012, respectively	2					2
Stock options exercised, 20,000 shares and 38,900 shares in 2013 and 2012, respectively	710	49		661
Vesting of restricted stock units and other, net 60,674 shares and 48,519 shares in 2013 and 2012, respectively	115	92	(561)	584
Amortization of unearned portion of stock-based compensation, net of forfeitures	1,308			1,308
Balances at Jun. 30, 2012	1,159,589	140,055	(745,205)	151,619	1,946,518	(383,347)	49,949
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)	36,448				31,043		5,405
Cash dividends declared:
Common @ $0.41 per share	(33,110)				(33,110)
Noncontrolling interests	(2,655)						(2,655)
Translation adjustments, net of deferred income taxes of $7,555 and $2,357 for the six months ended June 30, 2013 and 2012, respectively	(46,555)					(45,745)	(810)
Cash flow hedging instrument adjustments, net of deferred income taxes of $769 and $(895) in 2013 and 2012, respectively	536					536
Contributions from noncontrolling interests	4,502						4,502
Purchase of subsidiary shares from noncontrolling interest	(185)			(292)			107
Pension liability adjustments, net of deferred income taxes of $(457) and $(4,548), and $(2,118) and $(1,325) for the three and six months ended June 30, 2013 and 2012, respectively	31,223					31,223
Marketable securities unrealized gains, net of deferred income taxes of $(5) and $(1) for 2013 and 2012, respectively	8					8
Stock options exercised, 20,000 shares and 38,900 shares in 2013 and 2012, respectively	387	25		362
Vesting of restricted stock units and other, net 60,674 shares and 48,519 shares in 2013 and 2012, respectively	1,336	117	(840)	2,059
Amortization of unearned portion of stock-based compensation, net of forfeitures	2,185			2,185
Balances at Jun. 30, 2013	$ 855,744	$ 140,222	$ (746,045)	$ 156,959	$ 1,673,423	$ (425,146)	$ 56,331