Consolidated Statements of Equity (USD $) In Thousands, unless otherwise specified	Total		Common Shares	Additional Paid-in Capital	Treasury Shares	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interests
Beginning Balance at Dec. 31, 2010	$ 464,559		$ 96	$ 177,875	$ (14,058)	$ (28,799)	$ 316,317	$ 13,128
Increase (Decrease) in Stockholders' Equity
Net income	96,825						95,106	1,719
Other comprehensive income	(14,291)					(14,291)
Purchase of treasury shares	(3,039)				(3,039)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	3,688			1,588	2,100
Dividends declared	(8,900)						(8,900)
Ending Balance at Dec. 31, 2011	538,842		96	179,463	(14,997)	(43,090)	402,523	14,847
Increase (Decrease) in Stockholders' Equity
Net income	75,565						79,480	(3,915)
Other comprehensive income	(2,289)					(2,289)
Proceeds received from minority investor	6,100							6,100
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	4,602			2,164	2,438
Dividends declared	(11,375)						(11,375)
Ending Balance at Dec. 31, 2012	611,445		96	181,627	(12,559)	(45,379)	470,628	17,032
Increase (Decrease) in Stockholders' Equity
Net income	95,702						89,939	5,763
Other comprehensive income	24,198	[1]				24,198
Proceeds received from minority investor	152							152
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	5,035			2,698	2,337
Dividends declared	(12,111)						(12,111)
Performance share unit dividends equivalents	0			55			(55)
Ending Balance at Dec. 31, 2013	$ 724,421		$ 96	$ 184,380	$ (10,222)	$ (21,181)	$ 548,401	$ 22,947

[1] All amounts are net of tax. Amounts in parentheses indicate debits