Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

GOODWILL AND OTHER INTANGIBLE ASSETS [Abstract]

Schedule of Goodwill [Table Text Block]

	2011			2010
Balance at beginning of year	$	434,699		$	440,950
Goodwill acquired	15,425			7,778
Goodwill disposed	—			(12,952		)
Foreign currency translation	(2,381		)	(1,077		)
Balance at year end	$	447,743		$	434,699

Schedule Of Finite Lived And Indefinite Lived Intangible Assets By Major Class [Table Text Block]

	2011					2010
	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Customer relationships	$	95,203	$	(18,735	)	$	80,674	$	(15,968	)
Proven technology and patents	41,643		(25,174		)	36,262		(22,298		)
Tradename (finite life)	3,995		(1,072		)	2,420		(760		)
Tradename (indefinite life)	25,033		—			23,634		—
Other	743		(226		)	510		(102		)
	$	166,617	$	(45,207	)	$	143,500	$	(39,128	)