Consolidated Statements of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
BALANCES at Dec. 31, 2008	$ 453,324	$ 647	$ (31,889)	$ 296,227	$ 188,428	$ (983)	$ 894
BALANCES (in shares) at Dec. 31, 2008		64,705	(4,620)
Increase (Decrease) in Stockholders' Equity
Consolidated net income (loss)	15,116				14,958		158
Gain (Loss) on hedging activity, net of $174, $52 and $122 tax for the years ended 2011, 2010 and 2009, respectively	(198)					(198)
Foreign currency translation	13,397					13,374	23
Sale of common stock, net of $194 of issuance costs	23,220	90		23,130
Sale of common stock, net of issuance costs (in shares)		9,000
Acquisition of noncontrolling interests	271	8		628			(365)
Acquisition of noncontrolling interests (in shares)		782
Treasury shares issued under employee share plans	2,404		6,545	(565)	(3,576)
Treasury shares issued under employee share plans (in shares)			1,018
Tax benefit deficiency from employee share plans	(53)			(53)
Share-based compensation	3,763		273	3,632	(142)
Share-based compensation (in shares)			42
Purchases of treasury stock	(4,998)		(4,998)
Purchases of treasury stock (in shares)			(1,445)
BALANCES at Dec. 31, 2009	506,246	745	(30,069)	322,999	199,668	12,193	710
BALANCES (in shares) at Dec. 31, 2009		74,487	(5,005)
Increase (Decrease) in Stockholders' Equity
Consolidated net income (loss)	(77,690)				(77,160)		(530)
Gain (Loss) on hedging activity, net of $174, $52 and $122 tax for the years ended 2011, 2010 and 2009, respectively	(86)					(86)
Foreign currency translation	(11,462)					(11,446)	(16)
Acquisition of noncontrolling interests	(1,558)			(1,201)			(357)
Treasury shares issued under employee share plans	2,384		7,040	(430)	(4,226)
Treasury shares issued under employee share plans (in shares)			1,216
Tax benefit deficiency from employee share plans	20			20
Share-based compensation	4,090		470	3,789	(169)
Share-based compensation (in shares)			82
Purchases of treasury stock	(2,444)		(2,444)
Purchases of treasury stock (in shares)			(656)
BALANCES at Dec. 31, 2010	419,500	745	(25,003)	325,177	118,113	661	(193)
BALANCES (in shares) at Dec. 31, 2010		74,487	(4,363)
Increase (Decrease) in Stockholders' Equity
Consolidated net income (loss)	(67,232)				(67,261)		29
Gain (Loss) on hedging activity, net of $174, $52 and $122 tax for the years ended 2011, 2010 and 2009, respectively	284					284
Foreign currency translation	(7,946)					(7,951)	5
Treasury shares issued under employee share plans	7,490		14,005		(6,515)
Treasury shares issued under employee share plans (in shares)			2,444
Share-based compensation	4,911			4,911
BALANCES at Dec. 31, 2011	$ 357,007	$ 745	$ (10,998)	$ 330,088	$ 44,337	$ (7,006)	$ (159)
BALANCES (in shares) at Dec. 31, 2011		74,487	(1,919)