Consolidated Statements of Equity (Unaudited) (USD $) In Thousands, except Share data	Restricted Stock [Member] Common Stock [Member] USD ($)	Restricted Stock [Member] USD ($)	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Noncontrolling Interest [Member] USD ($)	Total USD ($)
Balance at Dec. 31, 2010				$ 392	$ 251,578	$ 347,249	$ 18,113	$ 9,375	$ 626,707
Balance (in Shares) at Dec. 31, 2010				39,246,015
Net income						3,006		121	3,127
Issuance of common stock including tax benefit				1	2,639				2,640
Issuance of common stock including tax benefit (in Shares)				98,516
Restricted shares issued				2					2
Restricted shares issued (in Shares)				164,253
Issuance of shares pursuant to deferred stock unit awards (in Shares)				1,308
Forfeitures of restricted stock (in Shares)				(17,216)
Equity based compensation expense					1,827				1,827
Investment by non-controlling interests								141	141
Distribution to non-controlling interests								(776)	(776)
Currency translation adjustment and derivative transactions							5,502	74	5,576
Balance at Mar. 31, 2011				395	256,044	350,255	23,615	8,935	639,244
Balance (in Shares) at Mar. 31, 2011				39,492,876
Balance at Dec. 31, 2011				394	260,680	373,796	5,862	8,257	648,989
Balance (in Shares) at Dec. 31, 2011				39,352,375
Net income						6,724		425	7,149
Issuance of common stock including tax benefit				1	670				671
Issuance of common stock including tax benefit (in Shares)				11,623
Restricted shares issued	2	2
Restricted shares issued (in Shares)	251,054		11,936
Issuance of shares pursuant to deferred stock unit awards (in Shares)				8,937
Forfeitures of restricted stock (in Shares)				(7,825)
Repurchase of common stock				(4)	(6,033)				(6,037)
Repurchase of common stock (in Shares)				(367,028)
Equity based compensation expense					1,541				1,541
Investment by non-controlling interests								3,920	3,920
Currency translation adjustment and derivative transactions							2,965	337	3,302
Balance at Mar. 31, 2012				$ 393	$ 256,858	$ 380,520	$ 8,827	$ 12,939	$ 659,537
Balance (in Shares) at Mar. 31, 2012				39,261,072